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Class 9 Science Assignments

We have provided below free printable Class 9 Science Assignments for Download in PDF. The Assignments have been designed based on the latest NCERT Book for Class 9 Science . These Assignments for Grade 9 Science cover all important topics which can come in your standard 9 tests and examinations. Free printable Assignments for CBSE Class 9 Science , school and class assignments, and practice test papers have been designed by our highly experienced class 9 faculty. You can free download CBSE NCERT printable Assignments for Science Class 9 with solutions and answers. All Assignments and test sheets have been prepared by expert teachers as per the latest Syllabus in Science Class 9. Students can click on the links below and download all Pdf Assignments for Science class 9 for free. All latest Kendriya Vidyalaya Class 9 Science Assignments with Answers and test papers are given below.

Science Class 9 Assignments Pdf Download

We have provided below the biggest collection of free CBSE NCERT KVS Assignments for Class 9 Science . Students and teachers can download and save all free Science assignments in Pdf for grade 9th. Our expert faculty have covered Class 9 important questions and answers for Science as per the latest syllabus for the current academic year. All test papers and question banks for Class 9 Science and CBSE Assignments for Science Class 9 will be really helpful for standard 9th students to prepare for the class tests and school examinations. Class 9th students can easily free download in Pdf all printable practice worksheets given below.

Topicwise Assignments for Class 9 Science Download in Pdf

Class 9 Science Assignments

Advantages of Class 9 Science Assignments

  • As we have the best and largest collection of Science assignments for Grade 9, you will be able to easily get full list of solved important questions which can come in your examinations.
  • Students will be able to go through all important and critical topics given in your CBSE Science textbooks for Class 9 .
  • All Science assignments for Class 9 have been designed with answers. Students should solve them yourself and then compare with the solutions provided by us.
  • Class 9 Students studying in per CBSE, NCERT and KVS schools will be able to free download all Science chapter wise worksheets and assignments for free in Pdf
  • Class 9 Science question bank will help to improve subject understanding which will help to get better rank in exams

Frequently Asked Questions by Class 9 Science students

At https://www.cbsencertsolutions.com, we have provided the biggest database of free assignments for Science Class 9 which you can download in Pdf

We provide here Standard 9 Science chapter-wise assignments which can be easily downloaded in Pdf format for free.

You can click on the links above and get assignments for Science in Grade 9, all topic-wise question banks with solutions have been provided here. You can click on the links to download in Pdf.

We have provided here topic-wise Science Grade 9 question banks, revision notes and questions for all difficult topics, and other study material.

We have provided the best collection of question bank and practice tests for Class 9 for all subjects. You can download them all and use them offline without the internet.

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CBSE Worksheets for Class 9 Science

CBSE Worksheets for Class 9 Science: One of the best teaching strategies employed in most classrooms today is Worksheets. CBSE Class 9 Science Worksheet for students has been used by teachers & students to develop logical, lingual, analytical, and problem-solving capabilities. So in order to help you with that, we at WorksheetsBuddy have come up with Kendriya Vidyalaya Class 9 Science Worksheets for the students of Class 9. All our CBSE NCERT Class 9 Science practice worksheets are designed for helping students to understand various topics, practice skills and improve their subject knowledge which in turn helps students to improve their academic performance. These chapter wise test papers for Class 9 Science will be useful to test your conceptual understanding.

Board: Central Board of Secondary Education(www.cbse.nic.in) Subject: Class 9 Science Number of Worksheets: 30

CBSE Class 9 Science Worksheets PDF

All the CBSE Worksheets for Class 9 Science provided in this page are provided for free which can be downloaded by students, teachers as well as by parents. We have covered all the Class 9 Science important questions and answers in the worksheets which are included in CBSE NCERT Syllabus. Just click on the following link and download the CBSE Class 9 Science Worksheet. CBSE Worksheets for Class 9 Science can also use like assignments for Class 9 Science students.

  • CBSE Worksheets for Class 9 Science All Chapters Assignments
  • CBSE Worksheets for Class 9 Science Diversity in Living Organisms Animals Assignment
  • CBSE Worksheets for Class 9 Science Diversity in Living Organisms Plants Assignment
  • CBSE Worksheets for Class 9 Science Experiments Assignment
  • CBSE Worksheets for Class 9 Science Force and Laws of Motion Assignment
  • CBSE Worksheets for Class 9 Science Fundamental Unit of Life Assignment
  • CBSE Worksheets for Class 9 Science Gravitation Assignment
  • CBSE Worksheets for Class 9 Science Improvement in Food Resources Assignment 1
  • CBSE Worksheets for Class 9 Science Improvement in Food Resources Assignment 2
  • CBSE Worksheets for Class 9 Science Law of Conservation of Mass Assignment
  • CBSE Worksheets for Class 9 Science Matter around Us Assignment
  • CBSE Worksheets for Class 9 Science Melting and Boiling Point Assignment
  • CBSE Worksheets for Class 9 Science Physical and Chemical Changes Assignment
  • CBSE Worksheets for Class 9 Science Preparation of Mixture and Compound Assignment
  • CBSE Worksheets for Class 9 Science Seperation of Components of Mixture Assignment
  • CBSE Worksheets for Class 9 Science Sound Assignment
  • CBSE Worksheets for Class 9 Science Structure of Atom Assignment
  • CBSE Worksheets for Class 9 Science Tissues Animals Assignment
  • CBSE Worksheets for Class 9 Science Tissues Plants Assignment
  • CBSE Worksheets for Class 9 Science Why do we fall Ill Assignment
  • CBSE Worksheets for Class 9 Science Assignment 1
  • CBSE Worksheets for Class 9 Science Assignment 2
  • CBSE Worksheets for Class 9 Science Assignment 3
  • CBSE Worksheets for Class 9 Science Assignment 4
  • CBSE Worksheets for Class 9 Science Assignment 5
  • CBSE Worksheets for Class 9 Science Assignment 6
  • CBSE Worksheets for Class 9 Science Assignment 7
  • CBSE Worksheets for Class 9 Science Assignment 8
  • CBSE Worksheets for Class 9 Science Assignment 9
  • CBSE Worksheets for Class 9 Science Assignment 10

Advantages of CBSE Class 9 Science Worksheets

  • By practising NCERT CBSE Class 9 Science Worksheet , students can improve their problem solving skills.
  • Helps to develop the subject knowledge in a simple, fun and interactive way.
  • No need for tuition or attend extra classes if students practise on worksheets daily.
  • Working on CBSE worksheets are time-saving.
  • Helps students to promote hands-on learning.
  • One of the helpful resources used in classroom revision.
  • CBSE Class 9 Science Workbook Helps to improve subject-knowledge.
  • CBSE Class 9 Science Worksheets encourages classroom activities.

Worksheets of CBSE Class 9 Science are devised by experts of WorksheetsBuddy experts who have great experience and expertise in teaching Maths. So practising these worksheets will promote students problem-solving skills and subject knowledge in an interactive method. Students can also download CBSE Class 9 Science Chapter wise question bank pdf and access it anytime, anywhere for free. Browse further to download free CBSE Class 9 Science Worksheets PDF .

Now that you are provided all the necessary information regarding CBSE Class 9 Science Worksheet and we hope this detailed article is helpful. So Students who are preparing for the exams must need to have great solving skills. And in order to have these skills, one must practice enough of Class 9 Science revision worksheets . And more importantly, students should need to follow through the worksheets after completing their syllabus.  Working on CBSE Class 9 Science Worksheets will be a great help to secure good marks in the examination. So start working on Class 9 Science Worksheets to secure good score.

CBSE Worksheets For Class 9

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CBSE Worksheets for Class 9 Science

CBSE Worksheets for Class 9 Science: One of the best teaching strategies employed in most classrooms today is Worksheets. CBSE Class 9 Science Worksheet for students has been used by teachers & students to develop logical, lingual, analytical, and problem-solving capabilities. So in order to help you with that, we at CoolGyan have come up with Kendriya Vidyalaya Class 9 Science Worksheets for the students of Class 9. All our CBSE NCERT Class 9 Science practice worksheets are designed for helping students to understand various topics, practice skills and improve their subject knowledge which in turn helps students to improve their academic performance. These chapter wise test papers for Class 9 Science will be useful to test your conceptual understanding. Board: Central Board of Secondary Education(www.cbse.nic.in) Subject: Class 9 Science Number of Worksheets: 30

CBSE Class 9 Science Worksheets PDF

All the CBSE Worksheets for Class 9 Science provided in this page are provided for free which can be downloaded by students, teachers as well as by parents. We have covered all the Class 9 Science important questions and answers in the worksheets which are included in CBSE NCERT Syllabus. Just click on the following link and download the CBSE Class 9 Science Worksheet. CBSE Worksheets for Class 9 Science can also use like assignments for Class 9 Science students.

  • CBSE Worksheets for Class 9 Science All Chapters Assignments
  • CBSE Worksheets for Class 9 Science Diversity in Living Organisms Animals Assignment
  • CBSE Worksheets for Class 9 Science Diversity in Living Organisms Plants Assignment
  • CBSE Worksheets for Class 9 Science Experiments Assignment
  • CBSE Worksheets for Class 9 Science Force and Laws of Motion Assignment
  • CBSE Worksheets for Class 9 Science Fundamental Unit of Life Assignment
  • CBSE Worksheets for Class 9 Science Gravitation Assignment
  • CBSE Worksheets for Class 9 Science Improvement in Food Resources Assignment 1
  • CBSE Worksheets for Class 9 Science Improvement in Food Resources Assignment 2
  • CBSE Worksheets for Class 9 Science Law of Conservation of Mass Assignment
  • CBSE Worksheets for Class 9 Science Matter around Us Assignment
  • CBSE Worksheets for Class 9 Science Melting and Boiling Point Assignment
  • CBSE Worksheets for Class 9 Science Physical and Chemical Changes Assignment
  • CBSE Worksheets for Class 9 Science Preparation of Mixture and Compound Assignment
  • CBSE Worksheets for Class 9 Science Seperation of Components of Mixture Assignment
  • CBSE Worksheets for Class 9 Science Sound Assignment
  • CBSE Worksheets for Class 9 Science Structure of Atom Assignment
  • CBSE Worksheets for Class 9 Science Tissues Animals Assignment
  • CBSE Worksheets for Class 9 Science Tissues Plants Assignment
  • CBSE Worksheets for Class 9 Science Why do we fall Ill Assignment
  • CBSE Worksheets for Class 9 Science Assignment 1
  • CBSE Worksheets for Class 9 Science Assignment 2
  • CBSE Worksheets for Class 9 Science Assignment 3
  • CBSE Worksheets for Class 9 Science Assignment 4
  • CBSE Worksheets for Class 9 Science Assignment 5
  • CBSE Worksheets for Class 9 Science Assignment 6
  • CBSE Worksheets for Class 9 Science Assignment 7
  • CBSE Worksheets for Class 9 Science Assignment 8
  • CBSE Worksheets for Class 9 Science Assignment 9
  • CBSE Worksheets for Class 9 Science Assignment 10

Advantages of CBSE Class 9 Science Worksheets

  • By practising NCERT CBSE Class 9 Science Worksheet , students can improve their problem solving skills.
  • Helps to develop the subject knowledge in a simple, fun and interactive way.
  • No need for tuition or attend extra classes if students practise on worksheets daily.
  • Working on CBSE worksheets are time-saving.
  • Helps students to promote hands-on learning.
  • One of the helpful resources used in classroom revision.
  • CBSE Class 9 Science Workbook Helps to improve subject-knowledge.
  • CBSE Class 9 Science Worksheets encourages classroom activities.

Worksheets of CBSE Class 9 Science are devised by experts of CoolGyan experts who have great experience and expertise in teaching Maths. So practising these worksheets will promote students problem-solving skills and subject knowledge in an interactive method. Students can also download CBSE Class 9 Science Chapter wise question bank pdf and access it anytime, anywhere for free. Browse further to download free CBSE Class 9 Science Worksheets PDF . Now that you are provided all the necessary information regarding CBSE Class 9 Science Worksheet and we hope this detailed article is helpful. So Students who are preparing for the exams must need to have great solving skills. And in order to have these skills, one must practice enough of Class 9 Science revision worksheets . And more importantly, students should need to follow through the worksheets after completing their syllabus. Working on CBSE Class 9 Science Worksheets will be a great help to secure good marks in the examination. So start working on Class 9 Science Worksheets to secure good score.

CBSE Worksheets For Class 9

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  • NCERT Solutions For class 9 Science
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NCERT Solutions for Class 9 Science - Free PDF Download

Class 9 Science is definitely more extensive than what students studied in the previous class. It also forms a foundation for everything that is yet to come in the higher chapter, therefore, paying complete attention and understanding each topic thoroughly is essential. While some students find Science difficult, some find it easy. However, to make it easy, understanding the subject is very important and this can be accomplished with the help of NCERT Solutions.

For students in Class 9, NCERT Solutions Class 9 Science is a great book to refer to. The Class 9 Science Solutions are available chapter-wise at Vedantu and can prove to be very useful for the students. Whether you are struggling to grasp the concepts of various topics in the chapters or willing to push yourself to score better in the exams, NCERT Solutions for Class 9 Science PDF is the answer for you. These solutions are provided in an easy-to-understand language and will promote self-learning among students. Class 9 Science consists of Physics, Chemistry, and Biology. It is important for students to understand all the concepts available in these subjects to score well. Through these, students will be able to get solutions for questions that they get stuck in. Students need to know that they should prepare for all chemistry formulas and Biology diagrams to do well.

The CBSE Class 9 Science Solutions , available for all the chapters, encourage a spirit of learning among students. What is even better is that students can learn all the chapters by following the NCERT Science Class 9 Solutions without even having to step out of their homes. NCERT Solutions for Class 9 Science are written by subject experts which in turn will help students to understand the chapters better. Students must focus on all the important concepts and topics available in NCERT Solutions . This will even help students to clear all their doubts in an efficient way and score well in their final examinations.

NCERT Solutions for CBSE Class 9 Science consists of solutions from important concepts and topics such as Natural Resources, Sound, Energy and Work, Gravitation, Laws of Motion, Motion, Living Organism, Tissues, Atoms, Matter, and so on. Apart from getting answers for these topics, students can even access all the extra questions, important questions, exemplar problems, previous year’s question papers, worksheets, sample papers, short answer questions, MCQs, HOTs questions, descriptive type questions, and others. There are even tricks and tips that students can look at to see how to do well and score well in their final examinations.

Vedantu provides the downloadable PDF of NCERT Solutions for Class 9 Science absolutely free of cost. All you need to do is register on the site and download the file. At Vedantu, these solutions are designed by subject matter experts who have immense knowledge and experience. These are designed as per the latest NCERT guidelines and exam pattern to make it a reliable material for exam preparation. Students can also Download NCERT Solutions for Class 9 Maths   to revise the complete syllabus and do well in the exams.

NCERT Class 9 Science Solutions can be found in a particular format to make it easier for students to access the chapters accordingly. These chapters are important for students to prepare for their examinations as well as to help them create a basic foundation for further studies. The solutions will even help students to do their assignments and score well. Given below are all the chapters that students must learn and understand in order for them to do well.

Detailed Overview of Class 9 Science NCERT Solutions

Overview of ncert solutions class 9 science.

For the students of Class 9 Science, it is really important to gain a proper conceptual foundation of the topics and chapters in the syllabus. The chapters included in the Class 9 Science textbook provide detailed insights into different scientific concepts, laws, processes, etc. Students can learn about different states of matter around us, atoms and molecules, the structure of an atom, the fundamental unit of life and much more. They will gain an understanding of different topics including motion, force, laws of motion, gravitation, energy, work, sound, etc. These topics will not only introduce them to new scientific principles but also help them progress in their higher studies. Students can take help from the 9th Science Guide to delve deeper into the topics and improve their knowledge.

The NCERT solutions for Class 9 Science prove to be excellent study materials for the students as they can understand the topics clearly and efficiently. They can practise solving the questions provided in the NCERT solutions and improve their answering skills in the best way. Doing that will enable the students to complete their syllabus ahead of time, leaving them some time to revise the chapters as well.

NCERT Solutions for Class 9 Science - Chapter-Wise List

Given below are the chapter-wise NCERT Solutions for Class 9 Science . These solutions are provided by the Science experts at Vedantu in a detailed manner. Go through these chapter-wise solutions to be thoroughly familiar with the concepts.

Know about: How do I score good marks in NCERT science class 9?

NCERT Class 9 Science Solutions - Chapter wise Free PDF Download

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NCERT Solutions for Class 9 Science – Free PDF Download

Class 9 NCERT Solutions are important for students preparing for the class 9  Science examinations. Some of the features of NCERT 9 Class Science Book Solutions include:

It consists of all the answers and questions available in the Class 9 NCERT textbook

Apart from containing all NCERT Solutions , it covers exemplar problems, extra questions, sample papers, important questions from previous year’s question papers, MCQs, worksheets, HOTs questions, descriptive type questions, short answering questions, and finally tricks and tips of answering questions

Students can opt for NCERT 9th class Science book solutions PDF free download . This ensures that the book is easily accessible to students at any time

To help students understand all the concepts and topics better, NCERT Solutions for Class 9 CBSE consists of diagrams. This even helps students to visualize the topics and learn them quickly.

NCERT Solutions for Class 9 comprise the most effective solutions that are available to help students to score well in their examinations.

The entire NCERT Science Class 9 Solutions can be availed free of cost at Vedantu. These solutions have been drafted as per the latest guidelines issued by the CBSE . To download the NCERT Solutions for Class 9 Science for a chapter, all you are required to do is click on the link of the particular chapter. The basic concept regarding the chapter is explained online by our experts in a Step-by-Step manner that can be easily understood by you.

The NCERT Class 9 Science solutions chapters will not only help you to understand the basic concepts but will definitely enable you to score more in your examination. All these chapters will help you achieve a more fundamental and in-depth understanding of Science and reinforce your knowledge of the subject.

It is very important to have a good understanding of the basic concepts such as work and energy, Structure of the Atom, Gravitation, Force and Laws of Motion etc. of Science-based subjects like Chemistry, Physics and Biology. NCERT Solutions for Class 9 Science includes solutions of all exercises given in the chapters according to CBSE Syllabus for you. When you are in doubt regarding any of the chapters in your CBSE NCERT Science book Class 9 , the NCERT Solutions Science Class 9 is of great help indeed. It helps you understand the concepts in a manner that virtually forms a picture in your mind and consequently builds up your confidence in the subject.

Explained in a logical manner, the Science NCERT Solutions Class 9 provides apt solutions for the chapters. Solutions of Various chapters are provided in great detail. Once you click on a particular chapter, you will be able to find the link to the solutions of the particular chapter. You can click on the particular chapter and visit the webpage where you will get to learn about the concepts. Available as a download option, the NCERT Solutions for Class 9 Science comes in very handy. Wait no further and register for the NCERT 9th class Science book solutions PDF free download for absolutely free of cost.

NCERT Solutions also has important questions that you can access which will help you score well in your examination. These solutions will help you to understand the CBSE NCERT Class 9 Science syllabus better. You will be able to tackle complex concepts and topics with the help of the NCERT Solutions PDF . The study materials are the ideal book that you can use for you to do well in your examinations. All the problems and solutions are explained in a step by step manner to further help you understand the topics. Concepts such as Tissues, Living Life Forms, Force, Movement, Laws of Movement, Energy, Attraction, Work, Sound. Normal Assets and so on are important for you to learn and understand in order for you to score well in your examination.

There are a total of 15 chapters that are available in the NCERT Solutions for Class 9 Science . Students can access these solutions that are written by subject experts to gain a better understanding of all the concepts and topics. Class 9 Science is an important subject for students to create a base of fundamental concepts. This will help them to score well in their examinations as well as help them do better in their higher classes. The solutions consist of explanations that are written in detail in a simple and easy-going language. This in turn will help students to score well in their annual examinations. Below given are the chapter-wise details of NCERT solutions Class 9 Science for you so that you can get an idea about the chapter and its free pdf of NCERT Solutions.

NCERT Solutions Chapter 1 Class 9 Science Matter in Our Surroundings

NCERT Class 9 Science Chapter 1 acts as a foundation for the learning of Chemistry in students and thus, requires you to have a thorough understanding. Solutions of intext exercises and end exercises of Matter in Our Surroundings, are explained elaborately in the notes by Vedantu that will help you to understand the basic concepts of Chemistry. This chapter allows you to relate to changes in your everyday life by explaining the changes that occur in the state of matter under the effect of pressure and temperature. All-cause and effect resulting in the change of state of the matter are explained in a very simplified manner for you to understand. Try to go through the text and then attempt to answer the questions.

Among the exercises included in NCERT Solutions for Class 9 Science Chapter, 1 are in text Ex 1, 2, 3, 4 and an exercise at the end. The end exercise of Chapter 1 has 9 questions in total. Most of the questions are application based and a few are memory-based questions to test your application skills and cognizance.

The first chapter in the science textbook of class 9 is Matter in Our Surroundings. Here is the list of important topics that are covered in the chapter:

What is the matter?

Classification

Physical properties of matter

Interchange in states of matter

Latent heat

The process like sublimation and evaporation

Effect of Change of Pressure

Along with this, students can also download additional study materials provided by Vedantu, for Chapter 1 of CBSE Class 9 Science Solutions –

Chapter 1: Important Questions

Chapter 1: Revision Notes

Chapter 1: NCERT Exemplar Solutions

NCERT Solutions for Class 9 Science Chapter 2 Is Matter Around Us Pure

Chapter 2 of NCERT class 9 Science book solutions is about “Is Matter Around Us Pure?” This chapter has been carried forward from the first chapter and it talks about various methods of separation and physical and chemical changes. The chapter explains the types of mixtures and solutions. There are various experiments conducted to explain various types of components of a solution and mixtures. So after understanding this chapter, you will be able to distinguish matter into mixtures and pure substances. For this chapter also question papers are solved on Vedantu which will help you to prepare better for your exams. Diagrams and flowcharts are given to help you clear your concept regarding this chapter.

Chapter 2 of NCERT Solutions for Class 9 Science includes Ex 1, 2, 3, 4 (intext) and an Exercise at the end which comprises a total of 11 questions. A greater number of questions are practical and application-based which allows you to improve the understanding of the chapter.

Chapter 2 “Is Matter Around Us Pure” covers the following topics:

What are compounds?

Characteristics of compounds

Properties of mixtures

Types of mixtures

Separation of mixture

Suspensions and their types

Colloids and their types

Along with this, students can also download additional study materials provided by Vedantu, for Chapter 2 of CBSE Class 9 Science Solutions –

Chapter 2: Important Questions

Chapter 2: Revision Notes

Chapter 2: NCERT Exemplar Solutions

Class 9 Science NCERT Solutions Chapter 3 Atoms and Molecules

The 3rd chapter of NCERT Solutions Class 9 carries a significant weightage in the examination with a minimum 3-4 questions being asked from this chapter, every year,  in most of the school examinations. Chapter 3 discusses Atoms and Molecules and also provides insight into the Mole Concept which is a very essential chapter in Class 11 as well. This is where you can build the foundation of the mole concept. To solve the several numerical based questions on the Mole concept, it is imperative that you have a thorough understanding. You will also get to know laws of chemical combination, symbols of elements etc. The solutions to all the questions have been provided by subject experts at Vedantu along with proper diagrams and illustrations. By going through the text and then referring to these NCERT class 9 Science book solutions, you will be able to form a clear picture of how questions are likely to be asked in the examination.

With 5 intext exercises and one at the end with 11 questions, the exercises of NCERT Class 9 Solutions Science for Chapter 3 are designed to test your application skills as well as cognizance.

Chapter 3 is atoms and molecules. The following topics are covered in the chapter:

Atoms and molecules

Laws of chemical combination

What is an atom?

What is a molecule?

Writing chemical formulae

Molecular mass and mole concept

Along with this, students can also download additional study materials provided by Vedantu, for Chapter 3 of CBSE Class 9 Science Solutions –

Chapter 3: Important Questions

Chapter 3: Revision Notes

Chapter 3: NCERT Exemplar Solutions

NCERT Solutions for Class 9 Science Chapter 4 Structure of the Atoms

Chapter 4 also falls under Chemistry and it is on the “Structure of Atom” . If understood properly, this chapter can prove to be very interesting. For those willing to pursue Science in higher Classes, this chapter can prove to be very beneficial. Vedantu’s experts have provided smart solutions to Chapter 4 of NCERT Solutions Class 9.  This chapter involves some basic mathematical calculations and different theories about the structure of atoms which is why it is very scoring. If you can grasp this chapter well, you will be able to score better in the Science paper. To retain all the theories related to atomic structure, keep practising questions from this chapter frequently. This chapter is an important chapter for you from exam perspective also as it includes many important concepts such as Neutrons, Protons, Isotopes, Valency etc.

NCERT Solutions for Class 9 Science Chapter 4 includes Intext Exercise 1, 2, 3, 4, 5, 6, 7 and an End Exercise. It contains a total of 19 questions in its end exercise. This chapter includes application and memory-based questions to test your understanding of the chapter.

The structure of Atoms and molecules covers the following concepts:

Structure of Atom

Charged particles in matter

The models of the structure of an atom

How are electrons distributed in different Orbits (Shells)?

Atomic number and mass number

Along with this, students can also download additional study materials provided by Vedantu, for Chapter 4 of CBSE Class 9 Science Solutions –

Chapter 4: Important Questions

Chapter 4: Revision Notes

Chapter 4: NCERT Exemplar Solutions

NCERT Solutions for Class 9 Science Chapter 5 The Fundamental Unit of Life

The 5th chapter - The Fundamental Unit of Life is related to Biology and it is the first chapter dealing with Biology in your syllabus. This chapter teaches you about cells. The cell structure is also explained in this chapter. Both animal and plant cells are explained with elaborate diagrams. For this chapter as well, you will get all NCERT Solutions for Class 9 Science on Vedantu.

Chapter 5 of Class 9 Science NCERT Solutions has 3 intexts and one end exercise. The exercise at the end has 11 questions. The questions are based on analysis and memory to test your analytical skills and cognizance.

Cell the basic unit of life covers the concepts of 

Cell as a basic unit of life

Prokaryotic and eukaryotic cells

Cell membrane and cell wall

Cell organelles 

Cell inclusions

Chloroplast,

Chromosomes' structure and function

Along with this, students can also download additional study materials provided by Vedantu, for Chapter 5 of CBSE Class 9 Science Solutions –

Chapter 5: Important Questions

Chapter 5: Revision Notes

Chapter 5: NCERT Exemplar Solutions

NCERT Solutions for Class 9 Science Chapter 6 Tissues

The 6th chapter in NCERT Solutions Class 9 Science is on Tissues and explanations on the varied tissue types have been provided. Questions from this chapter are often asked in the Olympiad as well. A thorough understanding of this chapter will allow you to form a strong foundational base in Biology along with increasing your scores in final and Olympiad examinations. Differences between animal and plant tissue have been explained with the help of illustrated diagrams for an enhanced understanding.

NCERT Solution Class 9 Science of Chapter 6 includes all intext exercises and end exercises for you.

Along with this, students can also download additional study materials provided by Vedantu, for Chapter 6 of CBSE Class 9 Science Solutions –

Chapter 6: Important Questions

Chapter 6: Revision Notes

Chapter 6: NCERT Exemplar Solutions

NCERT Solutions for Class 9 Science Chapter 7 Diversity in Living Organisms

Diversity in Living Organisms is the 7th Chapter in NCERT Science Class 9 Solutions . As you look around, you will discover a great deal of diversity among the various living organisms. The hierarchy in the plant and animal kingdoms and the system of classification have been explained in this chapter. How they are different from each other and their ways of life are explained through this chapter.

NCERT Solution Class 9 Science of Chapter 7 includes all Intext exercises 1, 2, 3, 4, 5, 6 and end exercises for you. The end exercise includes solutions to all 6 questions. These questions are memory-based questions to test your cognizance.

Along with this, students can also download additional study materials provided by Vedantu, for Chapter 7 of CBSE Class 9 Science Solutions –

Chapter 7: Important Questions

Chapter 7: Revision Notes

Chapter 7: NCERT Exemplar Solutions

NCERT Solutions for Class 9 Science Chapter 8 Motion

With chapter 8 you will be introduced to Physics. In this chapter, you will learn uniform motion and non-uniform motion. You will also understand the concept of speed and direction of motion. After understanding this chapter, you will be able to understand that all objects on the earth are in motion as the earth is constantly in motion. NCERT Solution Class 9 Science of Chapter 8 includes all Intext exercises 1, 2, 3, 4, 5 and end exercises for you. The end exercise includes a solution of all 10 questions given in your NCERT Textbook. These questions are based on your application skills, numerical skills and memory skills.

Along with this, students can also download additional study materials provided by Vedantu, for Chapter 8 of CBSE Class 9 Science Solutions –

Chapter 8: Important Questions

Chapter 8: Revision Notes

Chapter 8: NCERT Exemplar Solutions

NCERT Solutions for Class 9 Science Chapter 9 Force and Laws of Motion

You have studied the concept of Force in Class 9, now in class 9 you will study it in depth. You will learn about balanced and unbalanced forces. You will understand all three laws of motion and will get to know physicist Galileo Galilei. This chapter will enhance your conceptual understanding of Force and Motion. NCERT Solution Class 9 Science of Chapter 9 includes all Intext exercises 1, 2, 3 and end exercises and additional exercises for you. The end exercise includes a solution of all 18 questions given in your NCERT Textbook . These questions are based on your application skills, numerical skills and memory-skills.

Along with this, students can also download additional study materials provided by Vedantu, for Chapter 9 of CBSE Class 9 Science Solutions –

Chapter 9: Important Questions

Chapter 9: NCERT Exemplar Solutions

NCERT Solutions for Class 9 Science Chapter 10 Gravitation

You must have studied in Class 9 about Newton’s dilemma: why do apples always fall down from the tree? In this chapter of class 9 you will understand more about gravitational force. It is a very important chapter related to Physics. This chapter will give you a vivid idea about how gravitational force works. There are quite a few numericals in this chapter. So, you will require regular practice to score full marks in them. NCERT Solution Class 9 Science of Chapter 10 includes all Intext exercises 1, 2, 3, 4, 5 and end exercise for you. The end exercise includes the solution of all 22 questions given in your NCERT Textbook. These all questions are based on your numerical abilities, application skills, and memory-skills.

Along with this, students can also download additional study materials provided by Vedantu, for Chapter 10 of CBSE Class 9 Science Solutions –

Chapter 10: Important Questions

Chapter 10: Revision Notes

Chapter 10: NCERT Exemplar Solutions

NCERT Solutions for Class 9 Science Chapter 11 Work and Energy

In this chapter you will understand the scientific conception of work and different types of energy. The chapter includes many numericals also so it will require your mathematical skills as well. You need to practice the questions daily. These numericals are really very easy if you understand them and practice them on a daily basis. NCERT Solution Class 9 Science Chapter 11 includes all the 4 Intet and the end exercise, with the answers to all the 21 questions in it. All the questions in the end exercise have been designed to solve your numerical problems solving capabilities and your ability to apply concepts.

NCERT Solutions for Class 9 Science Chapter 12 Sound

You must have heard many types of sound and an echo as well. But what about the production of sound and its journey from its source to our ears. This chapter encompasses this journey and explores more concepts such as echo, reverberation, propagation of a sound wave, etc. NCERT Solution Class 9 Science of Chapter 12 includes all Intext exercises and end exercises for you. The end exercise includes the solution of all 22 questions given in your NCERT Textbook. These questions will test your understanding ability and numerical abilities.

NCERT Solutions for Class 9 Science Chapter 13 Why Do We Fall Ill?

In this chapter you will understand the significance of health, acute and chronic diseases, causes of diseases etc. After reading this chapter, you will understand the value of hygiene for our good health. NCERT Solution Class 9 Science of Chapter 13 includes all Intext exercises and end exercise for you. The end exercise includes the solution of all 6 questions given in your NCERT Textbook. These questions will test your understanding ability and memory skills.

NCERT Solutions for Class 9 Science Chapter 14 Natural Resources

In recent years,  Chennai, Rajasthan, Bangalore and Qatar have experienced severe scarcity of water. Although one might think of several solutions to this problem, a solution that is both correct and practical can only be achieved by a proper understanding of the natural resources. This chapter will provide you with an in-depth understanding of the various natural resources where you get to learn about the role of the atmosphere in climate control, carbon cycle, nitrogen cycle etc. All the intext exercises along with an end exercise have been included in the NCERT Solution Class 9 Science of Chapter 14 . Solutions to all the 6 questions of the end exercise in the N CERT Textbook have been provided. The questions adjudge your comprehensive ability, analytical and memory skills.

NCERT Solutions Class 9 Science Chapter 15 Improvement in Food Resources

This chapter provided you with the knowledge of the nutrients supplied by air, water and soil. Insights into crop production and production management, storage of grains, the nutritional value of food, fertilizers, manure, animal husbandry, fish production and practices such as beekeeping are also provided. NCERT Solution Class 9 Science Chapter 15 comprises all the exercises in between the text along with the end exercise which has solutions to all 9 questions from NCERT Textbook that assess your memory and comprehensive ability. To prepare for the exams, make sure to read the chapter thoroughly and practise all the exercise questions. This is sure to help you score better.

Students can download the entire book of NCERT Solutions for Class 9 science in a PDF format. Students can access practice tests and mock tests to further understand the topics and concerts better. Vedantu even provides NCERT Solutions for all classes and subjects including science for classes from 6 to 12. Students can even download assignments, worksheets, notes, and other study materials that they may require to prepare for their examinations. This will ensure that they get a better understanding of all the topics and concepts in this chapter. Students will even access previous year’s question papers and sample papers to look at all the important questions that they might get in their examination. Before accessing NCERT Solutions books , students must know that most of the questions that are asked in the final examination paper for any class are taken in reference from NCERT Solutions.

CBSE 2023-24 Class 9 Science Marking Scheme

Detailed marking scheme of the examination is given below for you so that you can understand on which unit you should focus more to score maximum.

Why Must You Download the NCERT Solutions for Class 9?

The Prime reasons to download the class 9 Science NCERT solutions are-

Available for Free

Vedantu offers NCERT solutions for class 9 Science completely free. Every chapter of the subject authored by a professional is available completely free. If you are wondering whether you will be asked for money during the sign-up or while downloading, then you don't need to worry about It.

Accessible at any Time

Students can access NCERT Solutions offered by Vedantu at any given point of time. Students can open the PDF on any electronic device wherever they are. This PDF will even help students to revise properly.

Carries all Chapters

The NCERT solutions for class 9 Science subjects carry all chapters and each is assessed by subject experts. From Matter Around Us Pure to Structure of the Atom and The Fundamental of the Unit of Life, the solutions carry all chapters essential to cover and study.

Learn to Manage Time

Students usually face issues with time management when it comes to learning and completing the solution. By downloading the solution, you can develop strategies to learn and solve questions. Furthermore, it will also help in overcoming the anxiety of attending the exam.

Proper Explanation

Another major benefit of downloading the solution is each chapter is presented in an explained manner. The in-house subject authors have ensured that various chapters cover complete details to avoid any confusion later. Students who are in class 9 will be able to understand the subject clearly and will find it easy to handle the query.

CBSE Class 9 Science Examination - Preparation Tips

The NCERT Solutions for Science Class 9 contains all the important questions that are available in the NCERT textbook. Most of the questions available in this book can be expected to come in the annual examination. Hence, students should solve all the questions available in the NCERT Solutions book thoroughly in order for them to prepare for their examinations. The solutions provided by Vedantu will help students to ace their examinations with confidence as all the answers are provided in a step by step manner. Once students are able to understand how to answer certain questions and problems, they will be able to answer all the complex and twisted questions in the question paper without any difficulty.

You should go through the NCERT Solutions of Science Class 9 as it will help you to write answers in a concise and precise manner. Going through these chapter-wise solutions will improve your understanding of the concepts and will also boost your confidence, keeping you ready ahead of the crucial CBSE Class 9 Science examination. There are several techniques explained here that you can use for preparing well in Science.

You can always carry a little diary or notebook where you can jot down the crucial formulas/ principles or definitions to be used for particular sections. Note down a few terms and diagrams illustrating the experiments, explaining the important principles. You may also use it for last-minute revision. You need to have a thorough understanding of all the concepts rather than going through each and every word of the text and trying to remember the same. Resolve your doubts, if any, by attending the live classes at Vedantu without any hassles.

You must prepare a study plan as well if you want to do well in your exams. This way you will be able to space out your time and you will understand what topics and concepts you must focus on more. While creating your study plan you must make sure that you give time to yourself to breathe and take some rest. If you sit to study for hours you may get tired easily and your brain won’t be able to retain a lot of information altogether. You should also make sure that you take care of yourself during your examination. You must eat healthy and get sufficient sleep during your exams.

One of the best ways to prepare for your exams would be to practice. You must practice as much as you can. You can solve previous year’s papers, sample papers, and other question banks. This will help you get an idea of the exam pattern and the type of questions that can be asked. You must solve previous year’s question papers which are at least 10 years old. Apart from understanding the question and question paper pattern, you will even be able to manage your time properly. Time management is very important when it comes to writing an exam. You must know which section to pay more attention to and which section you will be able to finish quickly. Practicing with sample papers and other question banks will help you to manage your time accordingly.

Do not make a habit of procrastinating and allow your mind sufficient time to get a grasp of new concepts.  Start your preparation early and spare the last few days for exams. Prior to the exams, make sure you have covered all the topics beforehand. Learning new things just before the exams will not be favourable. Also, if you get study leaves before your exams then utilize those days carefully. Make a timetable and chalk out your subjects. Science subjects need more time to practice so allot at least 2-3 hours in a day for Science. Practice the numericals in the first hour and then spend another hour on revision and reading. You should also solve a few questions every day. Try to sit to study as early in the morning as possible when your mind is fresh. This is the time when your mind is the most active. If you have someone at home to help you out with studies, ask him/her to sit with you and check your answers when you solve them. Go through the corrections yourself to know where you went wrong. If you do not have anyone to help you out, try to do it yourself.

You should also understand that referring to NCERT Solutions for Class 9 Science is considered to be sufficient to prepare for your examinations. These solutions are framed by Vedantu keeping in mind the abilities of students. These solutions are provided in detail to help you easily understand all the complex topics and concepts. You can even learn technique and tricks to understand the topics better. In order for you to get an overall idea of the concepts, you must start to prepare for your exam beforehand.

Some Other Vital Suggestions for Studying

Another suggestion to study better is to have group studies. However, for this purpose, you and your group have to be really serious and dedicated. When you study in groups, you help each other to understand topics better. When you try to explain something to your friend, your own concepts are clarified better. This way both you and your friend benefit from a group study session. This is something you should always keep in mind since you have to ensure full utilization of these sessions. This is a good habit to have, particularly before the examinations.

Make a habit of solving question papers from the previous year. This will help you to get a hold of the different topics and question patterns usually followed in the exam. In case you do not have the previous years’ question papers, then get hold of some mock test question papers or sample test papers. Solving them is beneficial as you will be fully prepared with the format. Having a set of formulas ready for revision helps you with solving the sums. When you are revising through chapters that require you to do sums, have a separate notebook for writing down the formula. This book is of great help for last moment revision. You will not have to go through page after page looking for the formulas. All you need to do is open the notebook and check the formulas you need. This will help you stay abreast of the important formulas without having to really fret about finding them all over again in case you forget. A common scenario isn’t it? Well, a little strategy will help you overcome these hurdles with ease.

If you are a student who has problems with maths, you will need to practice a bit more than the others. Your theory should be well-prepared so that you can score better in that part. If you have the fear of mathematics, then make it a point to overcome that fear. Do not worry! Maths is not that difficult! All you have to do is forget the difficulty and practice daily. That is the only mantra behind acing maths. Just wake up in the morning and practice 2-3 sums from each chapter. Read the questions carefully before attempting the problem. Understand what it wants and what is already given. Go ahead with it when you understand the question properly.

One more important tip before exams that one must follow is being less distracted. You may think your guardian is being absolutely ruthless when he/she asks you not to watch TV before exams. But what he/she means is that you should wisely utilize your time and distract your mind. It is very important to get into that mindset of studying before exams. Try not getting disturbed or distracted as your mind needs to be in the right state to help you prepare. Allot a specific time for activities such as watching TV or playing video games. Make a time table for that too. You can study the whole day and have a recess period of 2 hours after studying, preferably at night before you go to bed.

Before you write your exam you must make sure that you do a complete revision at least 3 times. Make sure that you don’t learn any new topics one night before the exam. This will only lead to confusion and you might even forget the other topics and concepts that you learned. You should revise one day before the exam, during the night, and then you can do a quick revision in the morning. With the notes that you have, revising concepts and topics will make it easier for you to do. For Class 9 Science , it is important for you to revise how to draw all the diagrams that are required for the examination. This will help you score better marks.

What Else Should You Know While Preparing?

Eating and sleeping sufficiently before exams are very necessary for your body. Eat your food on time and sleep on time. Do not compromise on sleep or go to bed late just the night before your exam. This can cause severe headaches in the morning, potentially making you fall sick while writing your exam. Take proper food with a balanced diet plan so that both your body and mind are healthy.

Lastly, do not take too much pressure. If you are having a problem with any chapter, just get help from Vedantu. Do not stress too much and take short breaks in between study hours. Sitting for long periods can give you back pain and stress you out. Start with the difficult chapters first and then move on to the chapters you find easy. Keep your notes and books arranged so that you do not have to get up repeatedly. Keep cell phones and video games away from the study table. Anything that distracts you should remain out of your sight.

On the day of the examination, try not to discuss what you learned with your friends. This can lead to further confusion for both you and your friends. The way you may have learned a particular concept could be different as compared to the way your friends may have learned a particular topic. Apart from this you may also get confused as to if you missed any topics while studying or not. But don’t worry, you have given your best in your preparation and you will do well according to how you have studied.

These are tried and tested methods and have yielded results for lakhs of students like you all over the country. So, wishing you all the best for your preparation for the CBSE Class 9 Science examination . We advise you to be positive, confident as well as get the concepts clear for good exam performance and a high score. Also, revise the solutions to past question papers after understanding the content of the relevant chapters.

NCERT Solution for Class 9 Science - PDF Availability

Students can get the NCERT Solutions for Class 9 Science for free which they can download at Vedantu. When it comes to NCERT Solutions for Class 9 Science , Vedantu is the best option available to you. You can get easy online access to step-by-step Science NCERT Solutions Class 9 as PDF Free download format, here. The NCERT Solution can be downloaded absolutely free of cost. Vedantu offers a free PDF for NCERT Solutions for Science Class 9 . Apart from being totally free, the PDF can be accessed anytime as per your convenience and from anywhere and what’s more important is that the solutions are provided and reviewed by experienced teachers with long-standing experience.

All the textbook questions and exercises available in the chapters have been answered by subject experts who have vast experience in this subject. Solving these questions will help students to get a detailed and better understanding of all the concepts and topics effectively. The solutions are provided in a step-by-step manner with diagrams to help students to improve their logical thinking and analytical thinking.

The latest edition of NCERT Solutions for Class 9 Science is available at Vedantu based on the CBSE syllabus which will enhance your ability for exam preparation and the convenient download option makes things more hassle-free. You can now study as per the latest syllabus and get all the necessary study material at your fingertips.

Why Vedantu is Always the Best

Vedantu is a pioneer in online tutoring in India, facilitating LIVE learning for students with more than 500 highly qualified teachers who have already taught more than 40,000 students for a cumulative total of 1 million hours and counting!

Vedantu brings quality education to students throughout the country and abroad, covering more than 1,000 cities in 30+ countries. The unique platform for online tutoring fosters interactive learning and knowledge sharing in a personalized manner between students and the teachers, courtesy individual and group lessons which are imparted seamlessly. Teachers can make use of video, two-way audio and whiteboard solutions for delivering lessons, thereby explaining the terms, concept, and the principles in a manner which will leave a forever mark in the young minds. This will ensure you score high in the examinations. The best news here is that you can get free PDFs of any chapter for any class. This makes the process less time-consuming and hassle-free. You can choose to learn from a place of your convenience.

With Vedantu, students and teachers can interact in real-time. A host of learning solutions, resources and study materials across Standard I to XII for many school boards, as well as competitive examinations, are offered here. This is what makes Vedantu the best among all the online learning platforms. Vedantu offers study (NCERT) solutions which facilitate easier learning for you while helping you prepare better for examinations.

Vedantu provides students with online notes, important questions, NCERT Solutions , previous year’s questions and other question banks, as well as popular textbook solutions. Students can access these through the Vedantu online portal for free. They can even download these notes and questions for free based on their convenience. These will ensure that students score well in their annual exams as well as do well in their assignments. Vedantu even provides online tutoring which will help students to clear all their doubts and ace their exams.

National Council of Education and Research or  NCERT , is an independent body established in 1961 by the Government of India to formalize school education and design curriculum for schools across India (including all the CBSE schools). The goal of NCERT is to promote quality learning that is based on comprehensive research in different fields of study. It is recognized globally for its fostering of practical knowledge with a holistic approach.

The 9th Standard is an important year in the lives of the students. All the topics of Maths, Science, English, Hindi and Social Science plays a crucial role in building a foundational base for the subject that is required in higher studies. Science is an integral part of the curriculum and teaches about the human body and its interactions with the surrounding environment, properties of different materials, animal and plant kingdom, etc. The subject incorporates the theories related to human existence and environment and hence, it is one of the most relevant subjects. Students must learn how to write answers in the Class 9 Science examination correctly without making any mistakes.

NCERT Solutions for Class 9 Science helps students to find answers to the textbook problems and clear all their doubts regarding the questions given in the NCERT book. The solutions are given by expert teachers who are well versed in CBSE curriculum and learn how to write answers in the exam that would fetch more marks. Students can take advantage of the well-curated NCERT Solution for all the subjects available on many online educational sites. Referring to the NCERT Solution for Class 9 Science will help students to improve their subject knowledge and marks. Students will feel a boost of confidence to attempt their exam properly. For those willing to form a career in Science, it is important that s/he understands all the concepts in Class 9 Science thoroughly.

CBSE Class 9 Science Chapter-wise NCERT Solutions

CBSE Class 9 Science NCERT Solutions is available in both Hindi and English languages. Students can access both the solutions PDF chapter-wise. Our in-depth understanding of human anatomy and lives around us is based on the understanding of Class 9 Science. The CBSE curriculum of Class 9 Science includes chapters related to all the three major sub-branches of Science i.e. Physics, Chemistry and Biology. Class 9 Science CBSE syllabus includes many topics related to daily life. Students can seek help from chapter-wise NCERT Solutions and prepare for their examination with full vigour. It is important that you download NCERT Solutions for Class 9 Science from genuine sources that include chapter-wise solutions and are available for free download.

The chapter-wise NCERT Solutions for Class 9 Science is extremely helpful in solving textbook problems. Students should first make a habit of understanding the chapters and then refer to the NCERT Solutions if they are having trouble in solving the questions given in the textbook. All these chapters have been designed in a manner that they allow students to build the right foundation for higher classes. Many students find Science an engaging and interesting subject and if you prepare well for the subject, scoring in the Science paper is not that difficult.

NCERT Solutions Class 9 Science offers textbook exercise solutions crafted by subject matter experts who are well versed in NCERT guidelines and CBSE syllabus . Class 9 Science NCERT textbook includes chapters on the matter, laws of nature, resources, human diseases, etc. In chapter 1, 2, 3 and 4, you will get to know in detail about the matter and the atoms and molecules that form the inner constituents of a matter. Chapter 5, 6 ad 7 deals in depth with the human body and what it is formed of including Cells, tissues and other fundamental units of life. Chapter 8, 9, 10 and 11 are physical aspects of nature dealt thoroughly in higher classes during the study of Physics. All these chapters are crucial to understanding the important concepts related to humans and the environment around us.

There are a plethora of advantages of Using NCERT Solution for Class 9 Science . NCERT Solution is the best way to fast track exam preparation and learn for the exam efficiently. These Solutions are designed by the experts and hence, it will boost confidence to deal with any type of questions asked in the final exam. NCERT Solution for Class 9 Science also helps to clear all your subject related doubts and score well in Class 9 CBSE exam .

There are a total of 15 chapters out of which Chapter 7, Chapter 9, Chapter 10, and Chapter 11 are considered to be difficult chapters. Hence, you must focus on these chapters more and try to understand the concepts instead of just memorizing them. There is no shortcut to learn this subject, you need to work hard and believe in yourself.

Why Vedantu

Vedantu is a one-stop destination for accessing all the study materials and expert guidance. The NCERT CBSE Solution for Class 9 Science is a well-created study material for Class 9 students. Vedantu is known to offer 100% authentic and accurate study materials that help students to prepare for the exam. These solutions are provided to students by the subject matter experts who have years of teaching experience. Students will not be required to spend any money if they wish to avail these resources. Be it the sample papers, previous year question papers or textbook solutions, students will be able to download the PDFs for free.

Vedantu caters to the most accurate NCERT Class 9 CBSE Solutions in a free to download PDF format that comprises chapter-wise solutions to the textbook problems. These solutions are available online so that students can access them anytime, anywhere sitting at the comfort of their homes. You can download NCERT Solutions for all the subjects including Maths, English, Social Science, etc.

Since its inception, Vedantu has successfully mentored young students in their academic development. Vedantu has a team of experienced mentors who are passionate about making learning fun and easy for every student. Vedantu believes that learning has to be interesting as well as engaging. Vedantu offers Online LIVE Interactive Classes where students are taught with the help of creative content and fun exercises that keep them engaged. Students can register for Vedantu’s LIVE Interactive session at a very affordable price and clear all their subject-related doubts. All the study materials provided by Vedantu are thoroughly checked by the expert team for quality assurance. These materials are regularly reviewed and updated as per the latest guidelines to avoid any irrelevancy. If you wish to improve your academic performance, think no more and join Vedantu. Download the Vedantu App and avail all of its offerings at the comfort of your home, on your mobile devices.

There are many online educational services that offer Class 9 CBSE NCERT Solution . It is crucial to choose the right online platform that provides 100% accurate NCERT Solutions. Students should make an informed decision regarding the platform they want to choose for procuring all the necessary study materials. Vedantu’s online learning solutions ensure that you can avail the best study materials and expert guidance without travelling far to coaching classes. Get all the necessary assistance whenever you want! You can get all your doubts cleared with the help of the excellent mentoring team by registering with Vedantu. Vedantu is known to provide accurate and reliable NCERT Solution and other study materials to help you prepare for the exam. So, what are you waiting for? Grab your solution and prepare for exams.

Benefits of Downloading 9th Science Book Back Answers

The following are some of the main benefits of downloading NCERT Solutions Class 9 Chapter Wise Solutions.

All the NCERT Solutions for Class 9 have been prepared by experts at Vedantu in an easy-to-understand language. So, students will have no trouble learning the topics and understanding the concept of the chapters.

The Vedantu experts have created all the solutions for NCERT Class 9 Science chapters by following the CBSE guidelines. These solutions have been explained properly, using a step-by-step format. In this way, students will be able to tackle all the difficult questions easily and that too according to CBSE marking scheme.

All the fundamentals have been completely covered in the NCERT solutions. These solutions have been described using the rules, concepts, and principles from the particular chapters. Our experts have actually provided the solutions to make sure that students are able to delve deeper into the subject and get to know the meaning of different laws, processes, and equations.

The syllabus of Class 9 Science is really wide, consisting of many important chapters. These chapters include some advanced concepts that might be difficult for students to understand. So, in case there are any areas where you might have some doubts, NCERT solutions can be your guide. Students can figure out the topics that they need to learn more about and rectify their mistakes by comparing their solutions to the ones provided in the PDF files.

NCERT Science Book Class 9 Solutions PDF Free Download For Better Results

Visit the official website of Vedantu and download the NCERT Solutions for the Class 9 Science textbook chapters. Vedantu is one of the most trusted ed-tech platforms to find the best study materials. Students can use the NCERT Class 9 Science solutions to complete their syllabus and learn about different chapters in the book. They can use these solutions as study materials to boost their exam preparation.

Important Related Links for NCERT Class 9

CBSE Class 9 Revision Notes

NCERT Books for Class 9

Important Questions for CBSE Class 9

NCERT Exemplar Solutions for Class 9

CBSE Class 9 Syllabus

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FAQs on NCERT Solutions For class 9 Science

1. How to Prepare for CBSE Class 9 Science?

The best way to evaluate your progress before an exam is solving as many question sets as possible. It will strengthen your knowledge of concepts as well as increase your efficiency in providing prompt answers.

Besides explanations and keys, class 9 NCERT Science solution also comes with practice exercises formulated by learned scholars to help you improvise on your reasoning skills which is very crucial for a subject like Science. You can also refer to NCERT class 9 Science solutions for last minute notes and suggestions.

2. How many chapters are there in the class 9 NCERT solution?

The NCERT solutions for class 9 science carry all 15 chapters. These chapters are framed by Vedantu in-house subject experts, covering all the fundamental concepts that will help in scoring higher marks.

3. Is this solution enough to prepare for the exam?

Yes, the NCERT solutions for class 9 science available in PDF format are enough to prepare for the exam. These solutions are accurate and in detail, prepared according to the CBSE guidelines. Students don't have to worry about the authenticity of the solution.

4. Where can I get the NCERT Solutions for Class 9 Science?

Follow these steps to download the NCERT Solutions for Class 9 Science -

Click on the NCERT Solutions for Class 9 Science Link.

On this page, you will find the chapter-wise NCERT Solutions for Class 9. You can click on the chapter name for which you want the solutions.

On clicking the chapter’s name, you will be redirected to the next page from where you can download the PDF.

5. Are the NCERT Solutions for Class 9 Science sufficient for the exam preparation?

Yes. The NCERT textbook is the best resource for preparing for your Class 9 Science exam. Students should refer to the NCERT Solutions for Class 9 Science to learn all the concepts thoroughly. With these two resources, students can prepare for their exams and score well. They can also refer to other study material and resources available on Vedantu for additional practice and understanding.

6. What is the name of the Class 9 Science book?

The name of the Class 9 Science NCERT textbook is Science Textbook for Class 9. Students can download the Class 9 Science book from Vedantu. They can also download chapter-wise NCERT Solutions for Class 9 Science. They can download several other study materials for all subjects of Class 9, including NCERT Solutions, Chapter PDFs, Reference Books, Revision Notes, and Important Questions. Students can also use Vedantu's app to download the resources. All resources are available free of cost.

7. What is Sol in Chemistry according to the syllabus of Class 9th?

A colloid wherein small solid particles get dispersed in a liquid medium is called sol. An example of sol is an ink and soap solution. It is a heterogeneous mixture wherein one can see suspension easily. It is stable and does not scatter a beam of light. When left undisturbed, the solute particles in a sol will settle down. This concept is from the Chemistry part of Class 9 Science.

8. How many chapters are there in the NCERT Solutions Class 9 Science?

In the Class 9 Science NCERT textbook, there are 15 chapters. These are -

Matter in Our Surroundings

Is Matter Around Us Pure

Atoms and Molecules

Structure of The Atom

The Fundamental Unit of Life

Diversity in Living Organisms

Force and Laws of Motion

Gravitation

Work and Energy

Why Do We Fall ill

Natural Resources

Improvement in Food Resources

NCERT SOLUTIONS FOR CLASS 9

Cbse class 9 study materials, home tuitions in india.

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NCERT Solutions for Class 9 Science

assignment of 9th science

Revised NCERT Solutions for Class 9 Science all chapters in Hindi and English Medium updated for session 2023–24. According to new rationalised NCERT Books published for 2023-24 exams, there are only 12 chapters in course. Class 9 Science NCERT solutions refer to the answers, explanations, and step-by-step solutions provided for the science textbook of the 9th grade in the National Council of Educational Research and Training (NCERT) curriculum in Bharat. These solutions are designed to help students understand and solve the scientific problems and concepts presented in the Class 9 Science textbook.

NCERT Solutions of Class 9 Science

Chapter 1. Matter in Our Surroundings Chapter 2. Is Matter Around Us Pure Chapter 3. Atoms and Molecules Chapter 4. Structure of the Atom Chapter 5. The Fundamental Unit of Life Chapter 6. Tissues Chapter 7. Motion Chapter 8. Force and Laws of Motion Chapter 9. Gravitation Chapter 10. Work and Energy Chapter 11. Sound Chapter 12. Improvement in Food Resources

Class 9 Science NCERT Solution covers a range of topics including physics, chemistry, and biology. The solutions for these topics aim to provide a clear understanding of the scientific principles and theories covered in the curriculum. They guide students through solving various types of scientific problems and exercises appropriate for their grade level.

Learning science in school can significantly improve thinking skills and cognitive abilities. Here are several ways in which studying science enhances thinking skills in the context of school education. Science encourages students to question, analyze, and evaluate information and evidence. It promotes critical thinking by challenging students to make logical connections, identify biases, and assess the validity of claims and hypotheses.

Class 9 Science Solutions

Key features of Class 9 Science NCERT solutions cover a wide array of scientific concepts including motion, force, matter, atoms, cells, reproduction, and more. Solutions offer clear and detailed explanations of scientific theories, laws, and concepts to ensure students grasp the subject matter. All NCERT Solutions for grade 9 Science for 2023-24 and NCERT Solutions online and Offline Apps are Updated for new academic session.

Science education often involves solving complex problems. Students learn to break down intricate issues into manageable parts, formulate hypotheses, design experiments or investigations, and develop solutions. These problem-solving skills are transferable to various subjects and real-life situations.

Our online platforms Discussion offer features that allow students to ask questions and seek clarification on specific science topics or problems. This can be beneficial for clearing doubts and gaining a deeper understanding. Ask your doubts in Discussion Forum and share your knowledge with your friends and other users. For problems and questions, solutions provide step-by-step explanations, breaking down complex concepts into manageable steps. Solutions often include diagrams, illustrations, and charts to help students visualize abstract scientific concepts and phenomena.

Solutions include a variety of practice questions and exercises that allow students to apply their understanding and develop problem-solving skills. Free download links for Class 9 Science NCERT Solutions and UP Board Solutions in PDF format free are given below. Tiwari Academy provide supplementary resources such as video lessons, quizzes, and study tips.

Science emphasizes the importance of careful observation and making inferences based on collected data. Students develop the ability to notice patterns, draw conclusions from observations, and make predictions.

These resources can complement the learning process and cater to diverse learning styles. Many solutions relate scientific concepts to real-life examples, making it easier for students to understand the practical relevance of the topics. All the solutions are updated for new academic session for UP Board, Delhi Board, MP Board, Gujrat Board, Uttarakhand Board, etc., who are following NCERT Books 2023-24 for their final board exams.

Many solutions relate scientific concepts to real-life scenarios, helping students understand the practical relevance of what they’re learning. A strong understanding of Class 9 Science concepts is crucial for pursuing science and related subjects in higher education. Exploring scientific concepts in Class 9 can help students discover their interests and potential career paths in science-related fields.

Science involves collecting, organizing, and interpreting data. Students learn to use mathematical and statistical tools to analyze data, which strengthens their quantitative reasoning and data interpretation skills.

Class 9 Science Main Points & NCERT Solutions

Chapter 1. matter in our surroundings.

Class 9 Science Chapter 1 describes Physical Nature of matter like matter is made up of particle and the size of these particles. It further explains the characteristics of the particle of matter like they have space between them, they are moving with some kinetic energy, and they attract each other with a particular force. We all know that there are three states of matter – Solid, Liquid and Gas. In Chemistry Chapter 1 of Class 9 Science , we will go through the properties of matter in different states. Changing of state with the application of temperature, pressure, or other factors are also important for the exams.

Science relies on empirical evidence to support claims and theories. Learning science reinforces the importance of evidence-based reasoning and teaches students to make decisions and form opinions based on data and facts rather than unfounded beliefs.

Chapter 2. Is Matter Around Us Pure

Class 9 Science Chapter 2 explains about all types of substances, whether it is pure or a mixture of two or more pure substances. Homogeneous and heterogeneous mixture and their properties are frequently asked in school exams of class 9 Science. We have to learn here about how many types of solutions are there, how to prepare these solutions and how to find the concentration of a given solution. After doing this, we will be able to understand about Suspension and Colloidal also. Properties of Suspension and Colloidal are also crucial as exams point of view. Separating the components from the mixture using various methods are given at the end of this chapter. We can apply these ways in day to day life to understand in a better way.

Chapter 3. Atoms and Molecules

Class 9 Science Chapter 3 deals with Law of Chemical Combination, Law of Conservation of Mass and Law of Constant Proportion. Here, we will study that Atoms and Molecules are the fundamental building blocks of all matter. What is an atom? How big are they? What are the ancient or modern symbols of atoms? These type of questions are new for standard nine students. Atomic Mass and their symbols usually start from grade 9 and play an important role in higher classes. We should understand carefully about important Molecules and their valency along with the knowledge of ions – cation or anion. Using Criss-cross method, writing the formula of any compound is the most important part of Chemistry Chapter 3 of Class 9 Science . Questions based on Molecular mass and Mole concepts are also crucial for the class test or school terminal exams.

Class 9 Science

Chapter 4. Structure of the Atom

Class 9 Science Chapter 4 is based on sub-atomic particle like a proton – p, neutron – n and electron – e. It also explains the various steps of the discovery of the structure of atoms and its subparts. Structure of Atom includes the atomic models of J. J. Thomson, Rutherford and Bohr. Rutherford’s experiment, its observation and conclusion are considered as important topics of Chemistry Chapter 4 of Class 9 Science textbook. We have to learn here about Valency, Atomic Number, Mass Number and their correlation with each other. We should understand the difference between Isotopes and Isobars to remove any confusion in further classes.

Chapter 5. The Fundamental Unit of Life

Class 9 Science Chapter 5 is the first chapter of Biology in standard 9. This chapter tells us how Robert Hooke discovered the cell using a slice of cork. Cells are too small to see through naked eyes, but we can see the cell by microscope making temporary mounts of peels of onions. Here, we will be able to know about cells in the human body like Bone cells, Blood cells, Smooth muscles cells, Nerve cells, etc. The structural organisation of a cell, Plasma membrane and its phenomena with Isotonic, Hypotonic and Hypertonic solutions are briefly described in grade 9 Science, Chapter 5 Biology section. We should know about the function of Cell wall, Nucleus and Cytoplasm in a cell. A complete description of Plant cell and Animal cell with their components like Golgi Apparatus, Lysosomes, Mitochondria, Plastid, Vacuoles and Cell division is the main point of this chapter to study.

Chapter 6. Tissues

Class 9 Science Chapter 6 describes about the plant and animal tissues. Plant tissues include the explanation about Meristematic tissue – for the growth of plants and Permanent tissue – permanent in shape, size and function (simple and complex permanent tissues). Animal tissues cover the topics related to Epithelial tissue (also known as covering or protective tissue), Connective tissue, Muscular tissue and Nervous tissue. Nerve cells or Neurons are the fundamental units of the nervous system. Nervous tissues are made up of these Neurons. Neurons are the longest cells in the human body. An individual nerve cell may be up to a metre long.

Chapter 7. Motion

Class 9 Science Chapter 7 includes all the terms which describe the motion of an object. Most of the topics are based on the motion on a straight line or uniform motion. During the study of uniform or non-uniform motion, we will learn to find the average speed or speed during a specific duration. Chapter 7 of Class 9 Science contains many numerical problems in Physics following the three equation of motion. We should understand about the difference between velocity and speed as well as distance and displacement. Graphical representation of motion and the derivation of three equations of motion with a graphical method are frequently asked in school examination. Concepts of uniform circular motion and numerically based on it are also important for exams.

Chapter 8. Force and Laws of Motion

Class 9 Science Chapter 8 starts with focusing on the balanced and unbalanced force. Later on, it includes the impact of Friction force and Inertia also. The main motive to study Chapter 8 of Class 9 Science is to understand the laws of motion under the influence of force. Here, we will start from First law of motions and Inertia of body. Later on Second law of motion along with the law of conservation of momentum. We have to do all the intext questions and exercises questions based on particular on laws of motions and momentum. In the end, there are many reasoning questions based on the Third law of motion are given to understand about the law of Action-Reaction.

Chapter 9. Gravitation

Class 9 Science Chapter 9 is based on the concepts of Gravitation, Universal Law of Gravitation and Gravity. We should know that every object is attracted by other objects with a variable gravitational pull according to what the Gravitational Law states. The relation between Universal Gravitational Constant G and Gravitational Acceleration g is also important for terminal exams or class test. Chapter 9 of Class 9 Science also states about the difference between Mass and Weight considering the values of g. We know that G is constant, but the value of gravity varies according to the varying radius of Earth. Value of g is maximum at poles and least at the equator due to the elliptical structure of Earth. Concepts of Buoyancy, Buoyant force, Pressure and Thrust, Archimedes’ principle of floatation and Relative Density are the topic for exam preparation.

Chapter 10. Work and Energy

Class 9 Science Chapter 10 explains that Work and Energy are the same things only the states are changed. Work is concerted to different from of Energy or from Energy we can do work. Questions based on constant force and uniform motions are given as intext questions. Mechanical Energy is basically divided into two kinds as Kinetic Energy and Potential Energy. Kinetic Energy of an object is due to its motion whereas Potential Energy is due to its current position. The sum of Potential and Kinetic Energy is considered as Mechanical Energy. The other forms of energies are Heat Energy, Chemical Energy, Electrical Energy and Light Energy. The Law of Conservation of Energy, Work done, Power and Commercial unit of Energy are the main topics for numerical practice. The relation between 1 Unit and Joules are important for derivation as well as for numerical problems.

Chapter 11. Sound

Class 9 Science Chapter 11 deals with the production and motion of sound. We know that sound travels with different speed in different materials but does not travel in the vacuum as it needs a material medium to travel. Characteristic of a sound wave or Longitudinal wave and concepts of Compression and Rarefaction with Frequency, Amplitude and Speed is important for this segment of class 9 Science. We should also know about the Intensity, Softness, Loudness, Low and High Pitch of sound waves. Most of the numerical in Chapter 11 of Class 9 Science is based on speed, wavelength and frequency. Reflection of sound, including the concept of Echo, are important for conceptual questions. At the end of chapter 11 of 9th Physics , the concepts of Reverberation, instruments based on multiple reflections of sound, range of hearing, Sonar and application of Ultra-Sound waves are given for practice.

Chapter 12. Improvement in Food Resources

Class 9 Science Chapter 12 is based on various methods of improvement of food resources. Improvement of various crops like wheat, rice, maize, millets, etc. yield and improvement of crop variety are an exciting topic to read. Crop production management includes nutrient management like Compost and vermi-compost, Green manure, etc. manure and fertilisers. Irrigation, cropping pattern, crop production management, storage facility, animal husbandry, cattle farming, poultry farming, egg and broiler and fish production are the main points of focus.

Class 9 Science NCERT solutions align with the CBSE board exam pattern and help students prepare effectively for their science exams. Additional notes or explanations may be provided for parents and teachers to assist in explaining concepts to students. Class 9 Science NCERT solutions lay the groundwork for more advanced science concepts that students will encounter in higher grades. These solutions serve as valuable resources for both students and educators, aiding in learning scientific concepts, practicing problem-solving, and achieving academic success in the subject. Class 9 Science NCERT solutions can be found in the official NCERT textbooks, educational websites, and online platforms like Tiwari Academy.

We have updated all the NCERT Solutions 2023-24 for new session in PDF format. Class 9 Science NCERT solutions serve various important purposes for students, educators, and the learning process as a whole. Solutions provide clear explanations of scientific concepts covered in the Class 9 curriculum. They help students understand the fundamental principles of physics, chemistry, and biology.

While science is often associated with empiricism and objectivity, it also encourages creative thinking. Students are encouraged to devise innovative experiments, propose novel hypotheses, and explore unconventional solutions to scientific problems.

PDF file related to all chapters are given on the chapter’s page. Solutions guide students through solving a variety of scientific problems. This helps them develop problem-solving skills and logical thinking abilities. If you are facing in downloading these pages, please contact us for help. Solutions include practice exercises that allow students to apply what they’ve learned. Regular practice using these solutions helps reinforce understanding and memory retention.

NCERT Solutions Offline Apps are also based on latest NCERT Books 2023-24. Download these apps for offline use . If you have downloaded these apps once, there is no need of internet connection later on.

How to Study Science in Class 9 to Score Maximum Marks

According to NCERT textbooks published for session 2023-24, there are total 12 chapter in Class 9 Science. If you are going to prepare for terminal exams, you have to focus on all chapters. Tiwari Academy is known for providing educational resources and solutions for various subjects, including Class 9 Science. Here are some potential advantages of studying Class 9 Science at Tiwari Academy. Follow the steps mentioned here to know how you can score 100 percent marks in Science doing less efforts. It can help you, and you can ask the question to know about the little tips tricks that can help to solve the question. We typically offers comprehensive solutions to the Class 9 Science NCERT textbook. These solutions often include detailed explanations and step-by-step instructions for solving problems and understanding concepts.

Step 1: Plan to Score 100% Marks in class 9 Science Exams.

Step 2: complete one topic daily irrespective of time spend., step 3: summarize the whole lesson and practice board questions., step 4: be punctual and regularly follow study time table., step 5: give priority to ncert textbook and exemplar book only..

Step 1: Plan to Score 100% Marks in class 9 Science Exams.

Students can use solutions to verify the accuracy of their answers while working on assignments or practice exercises. This encourages self-assessment and correction of mistakes. Class 9 lays the foundation for board exams in Class 10. Solutions provide a framework for practicing questions similar to those that might appear in exams, helping students prepare effectively.

In essence, Class 9 Science NCERT solutions provide structured guidance for learning and understanding scientific concepts. They play a vital role in building a strong foundation for advanced science education and fostering an appreciation for scientific inquiry and discovery.

Solutions offer explanations that parents and teachers can use to clarify concepts to students. This fosters a collaborative learning environment. Teachers can use solutions as a guide to explain concepts effectively in the classroom. They offer insights into age-appropriate teaching methods. Solutions often include interactive elements like practical activities and experiments that make learning science engaging.

How to score well in class 9 Science First Test Exams?

Questions in exams are generally asked from the exercises given in the end of exercises or intext questions given in between the chapter. Students should read the NCERT Textbook for class 9 Science carefully and just note down (and underline) all the important terms occurring in the paragraphs. After completing the chapter, it will help a lot in revision. Spend about 1 to 2 hours for studying science in class 9 to score a significant score in class 9 Science.

How many chapters are difficult in class 9 Science Book?

As per the new rationalised NCERT textbook issued for 2023-24, there are total of 12 chapters in 9th Science as per NCERT Textbooks. Most of the chapters are easy but time consuming. As per most of the students, Chapter 7, 8, and 10 are consider as difficult one. If you spend time with any chapter it will appear as an easy one otherwise seem as a most difficult chapter in book. There is no shortcut to learn science in 9th standard, only hard work tends to success.

How many chapters are there in class 9 Science Chemistry Section?

First four chapters of class 9 Science is for Chemistry sections. The name of the chapters are as follows: 1. Matter in Our Surroundings 2. Is Matter Around Us Pure 3. Atoms and Molecules 4. Structure of the Atom Out of these four chapters, the chapter 3 and four are most important. The concepts used in these two chapters are also frequently asked in class 10 Science.

Which is the best book to prepare Class 9 Science First Term Exam?

NCERT is not only written in simple language but the reference pictures are also very good to understand the fact of science. So, if a child study with NCERT textbooks, he would be able to score good marks easily. If someone need more practice after completing the NCERT, he must go through the NCERT Exemplar books.

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Natural Resources Chapter 14 Class 9 Science Assignments

Please refer to Natural Resources Chapter 14 Class 9 Science Assignments below. We have provided important questions and answers for Natural Resources which is an important chapter in Class 9 Science. Students should go through the notes and also learn the solved assignment with solved questions provided below. All examination and class tests questions are as per the latest syllabus and books issued by CBSE, NCERT, and KVS. We have also provided Class 9 Science Assignments for all chapters on our website.

Chapter 14 Natural Resources Class 9 Science Assignments

Question. Name two biologically important compounds that contain both oxygen and nitrogen.

Proteins and nucleic acids (DNA and RNA).

Question. The atmosphere acts as a blanket, how?

Air is a bad conductor of heat which keeps average temperature of the Earth steady during day and at night. The ozone shield of the atmosphere absorbs most of the harmful radiations coming from Sun.

Question. List any two traditional systems of water harvesting.

Two traditional systems of water harvesting are : Collection of water in ponds and construction of small Earthen dams.

Question. Define anaerobic degradation.

Breakdown of organic matter by microorganisms when oxygen is not present is known as anaerobic degradation.

Question. Name the three processes which used oxygen.

Combustion, respiration and in the formation of oxides of nitrogen.

Question. What is the greenhouse effect?

Some gases prevent the escape of heat from the Earth.An increase in the percentage of such gases in the atmosphere would cause the average temperatures to increase worldwide and this is called the greenhouse effect.

Question. Give two natural resources available on the Earth.

Water and air.

Question. State two reasons each of conserving (a) forest and (b) wildlife.

Two reasons each of conserving : (a) Forest (i) It helps in retaining the sub-soil water. (ii) It checks flood. (b) Wildlife (i) To maintain ecological equilibrium. (ii) To protect the nature.

Question. Why does Moon have very cold and very hot temperature variations, e.g., from –190°C to 110°C even though it is at the same distance from the Sun as the Earth is?

Absence of atmosphere on the Moon.

Question. Identify which of the following are not the part of biotic environment : soil, plants, fish, air, insects.

Question. Name two oxides formed by burning of fossil fuels, which are responsible for acid rain.

The oxides of nitrogen and sulphur : (i) Sulphur dioxide and sulphur trioxide. (ii) Nitrous oxide and nitrogen dioxide.

Question. State an instance where human intervention saved the forests from destruction. Answer.  Human intervention saved the Arabari forest range of West Bengal from destruction with active and willing participation of local community. The Sal forest of Arabari underwent a remarkable recovery.

Question. What are the consequences of global warming? Answer. (i) An increase in temperature of Earth even by 1°C may lead to melting of ice on the poles. (ii) The melting of ice will result in rise of sea level. (iii) Due to rise in sea level, many coastal cities will be flooded or submerged. (iv) Increase in temperature of Earth, results the changes in weather and may cause excessive raining or drought or extreme hot or cold weather conditions.

Question. What is ozone hole? Where is it found? What is its effect? Answer.  There is a layer of ozone in the upper regions of the atmosphere which gets depleted due to chlorofluorocarbons and created a hole that is called ozone hole. It is found above North Pole.

Question. Which cycle is known as the perfect cycle in biosphere? Why? Answer.  Nitrogen cycle is known as the perfect cycle in biosphere as it maintains the amount of nitrogen in atmosphere, water and soil.

Question. How is reuse better than recycling? Answer.  ‘Sustainable management’ is the management of resources in which development can be maintained for a long time without undue damage to the environment.Recycling needs additional energy to make a usable item. Reuse does not require additional energy and hence, is better than recycle.

Question. How did ‘Chipko Andolan’ ultimately benefit the local people? Describe briefly. Answer.  Chipko Movement : (i) During 1970, in Reni village of Garhwal, a contractor was allowed to cut trees in a forest near the village. (ii) When the contractor’s workers went to the forest to cut trees, the women of the village hugged the tree trunks to prevent the workers from cutting trees. (iii) Chipko means ‘hug’ and the movement began with the villagers hugging trees. It is called the ‘Chipko Andolan’. (iv) The movement benefited the local population as it conserved the forest products. It benefited the environment as it conserved the quality of soil and sources of water thereby, maintained balance in nature.

Question. Name four human activities which cause air pollution. Answer. Mining :  Mining activities release dust. Thermal power plants :  Air pollution caused by burning of fossil fuel. Firework on festivals :  It results in the release of toxic chemicals into air.Burning of fossil fuel : In industries, automobiles,domestic purposes, etc.

Question. Name the stages of the life cycle of aquatic animals which are affected by change in temperature. Answer.  The eggs and larvae of various aquatic animals are sensitive to temperature changes. Sudden change in the temperature in the water body would be dangerous for them or affect their breeding.

Question. Which of the two is a better option, (i) to collect rainwater in ponds or artificial lakes, or (ii) to let it recharge groundwater by water harvesting? List two advantages of the option to justify your Answer. Answer. To allow rainwater to recharge groundwater by water harvesting is the better option. Its advantages are : (i) Groundwater does not evaporate. (ii) Groundwater does not provide breeding ground for mosquitoes.

Question. How is soil formed? Answer. The rocks near the surface of the Earth are broken down by various physical, chemical and some biological processes over long periods of time, thousands and millions of years. Finally, fine particles of soil formed.There are many other factors which play a vital role in the formation of soil. These factors are : (i) The Sun heat, (ii) Water, (iii) Wind, (iv) Living organisms.

Question. List any two causes of our failure to sustain availability of underground water. Answer.  Two causes of our failure to sustain availability of underground water are : (i) Rising population : As the population increases, demand for water increases resulting in depletion of underground water level. (ii) Industrialization : Industries need more and more water to manufacture products. With growing industrialization, demand for water increases which results in reduction in the availability of underground water.

Question. Define biosphere. Name its components. Answer.  Biosphere is global ecological system integrating all living beings and their relationships, including their interaction with the elements of lithosphere, geosphere, hydrosphere and atmosphere. The two components of biosphere are : (i) Biotic :  All living organism such as plants, animals and microorganisms. (ii) Abiotic :  Air, water and the soil.

Question. Do you know any activity which may be polluting water sources? Answer. There are many activities which cause pollution of water sources such as : (i) Dumping of waste from factories, sewage from our towns and cities into rivers, (ii) Discharging polluting water from cooling towers into the water bodies affects the breeding capacity of aquatic organisms.

Question. What are the different states in which water is found during the water cycle? Answer. Three different states of water can be seen during the water cycle. These states are : (i) Gaseous state :  Form of water vapour which evaporates from the surface water, (ii) Liquid state :  Formed by the condensation of water vapour and can be seen in the form of rain, (iii) Solid state :  Formed by the freezing of liquid droplets in the upper layer of atmosphere which can be seen in the form of snow, hail.

66. What causes winds? Answer.  Winds are caused due to uneven heating of atmospheric air. This phenomenon can be seen near coastal regions during the daytime. The air above the land gets heated faster and starts rising. A region of low pressure is created as this air rises, and air over the sea moves into this area of low pressure. The movement of air from one region to the other creates winds. During the day, the direction of the wind would be from the sea to the land.

Question. “Soil is formed by water.” If you agree to this statement then give reasons. Answer. Water helps in the formation of soil in the following ways : (i) Water causes ‘wear off’ of rocks over a long period of time. (ii) It also causes the rocks to rub against other rocks creating small particles which are taken away downstream and deposited as soil. (iii) Water expands on freezing in crevices of rocks and break rocks into smaller pieces.

Question. What causes movement of air? Mention the factors which influence these winds? Answer. (i) Uneven heating of the atmosphere. (ii) Rotation of the Earth. (iii) Presence of mountain range. (iv) Difference in cooling and heating of land and water bodies. (v) Formation and condensation of water vapours.(any two)

Question. How is the atmosphere of Venus/Mars different from that of the Earth? Name two main gases present in Earth’s atmosphere. Answer.

Natural Resources Chapter 14 Class 9 Science Assignments

Question. What are the adverse effects of products of combustion of fossil fuels on the environment? Answer.  When fossil fuels are burnt, carbon dioxide, water,oxides of nitrogen and oxides of sulphur are formed.If the combustion takes place in insufficient air, then carbon monoxide is formed instead of carbon dioxide. Of these products, the oxides of sulphur and nitrogen and carbon monoxide are poisonous gases and carbon dioxide is a greenhouse gas.

Question. What is ‘Chipko Movement’? Why should we conserve forests? Answer. ‘Chipko Movement’ is a non-political public movement for conservation of natural habitat and wildlife by preventing excessive commercial exploitation of forests. Chipko means ‘hugs’ and the movement were started by the villagers of Garhwal by hugging trees to stop the contractor’s workers from cutting the trees. We should conserve forests because it helps in protection of land, retaining sub-soil water, checking floods, and thereby maintain a balance in the ecosystem.

Question. Give two examples each of the Renewable sources of energy and Non-renewable sources of energy. Answer. (i) Geothermal energy, wind energy (ii) Coal, petroleum

Question. Write any four advantages of water stored in the ground. Answer.  Four advantages of storing water in the ground are : (i) It does not evaporate. (ii) It is relatively protected from contamination by human and animal wastes. (iii) It does not provide breeding ground for mosquitoes. (iv) It provides moisture for vegetation.

Question. What is meant by exploitation of resources with shortterm aims? List its four advantages. Answer.  Exploitation of resources with short-term aims means consumption of resources for immediate requirement without their conservation for future. Its four advantages are : (i) It fulfils the requirement of mass population. (ii) It provides industrial growth. (iii) It provides economic development. (iv) It makes life comfortable.

Question. Define weathering. Write the different means which cause weathering. Answer.  The process of breaking down of rocks into small, fine mineral particles is called weathering. The weathering may occur due to physical, chemical or biological means.

Question. Why must we conserve our forests? List any two causes for deforestation to take place. Answer.  We must conserve our forests as they are of great value. The reasons for conserving forests are : (i) Forests help in protection of land and retaining sub-soil water. (ii) Forests check floods and maintain ecosystem. Therefore, forests must be conserved for economic and social growth. Two causes for deforestation taking place are : (i) For industrial needs. (ii) For development projects like building of roads or dams.

Question. Name any two forest products, each of which is the basis for some industry. Answer. (i) Pine wood for matchbox industry. (ii) Bamboo for paper industry.

Question. Describe how lichens and big trees influence the formation of soil. Answer. (i) Lichens grow on the surface of rocks and release substances that breaks down the rock surface. (ii) Moss grows on this surface and breaks it further. (iii) The roots of trees grow into rocks, form cracks and widen them further to form soil.

Question. State two changes you can make in your habits to reduce the consumption of electricity or water. Answer.  Two changes that can be made to reduce the consumption of electricity or water are : (i) Switch off lights and fans when not in use. (ii) Leaked taps should be repaired immediately.

Question. List the causes that affect the life forms that are found in water bodies in various ways. Name the element present in coal other than carbon that releases harmful gases during combustion of coal. Answer. (i) Excess of fertilizers and pesticides used in the farms are washed into water bodies. (ii) Dumping of sewage from dwelling places into water bodies. (iii) Release of contaminated water from industries. (iv) Release of water from dams affects the temperature of river. (v) Sulphur and nitrogen.

Question. Give any four changes that you would like to incorporate in the lifestyle of students of your age to move towards a sustainable use of available resources. Answer. (i) Follow the principle of three ‘R’s – Reduce,Recycle and Reuse. (ii) Plant more trees. (iii) Use public transport, school bus and car pools. (iv) Switch off unnecessary lights and fans, thereby save electricity.

Question. List any four benefit of water harvesting. Answer.  Benefits of water harvesting are : (i) It provides drinking water. (ii) It provides irrigation water. (iii) It is responsible for the increase in groundwater level. (iv) It reduces storm water discharge, urban flood and overloading of sewage treatment plants.

Question. What are the methods of preventing or reducing soil erosion? Answer.  The methods of preventing soil erosion are : (i) Afforestation :  Plants reduce erosion as the roots of plants bind the soil in place. (ii) Shelter belts :  Trees planted in lines around farmland reduce erosion by reducing the speed of the wind. (iii) Contour ploughing :  Farmers plough land so that furrows lie across the natural slope of the land which do not allow it to flow down carrying the topsoil. (iv) Terrace farming :  A terraced hillside is a series of steps formed by horizontal strips supported by walls. It gives the water sufficient time to percolate into the soil and nourish the crop. (v) Soil cover :  Soil left bare after harvesting a crop is often covered with dried vegetation to prevent erosion. (vi) Preventing overgrazing :  Even a very little grass on a field prevents erosion of soil as the grass has a tendency to bind soil molecules.

Question. Write a note on “how forests influence the quality of our air, soil and water resources”. Answer.  Forests influence the quality of air, soil and water resources in the following ways : (i) Influence of forests in controlling the quality of air: (a) Forests help in minimising the level of CO 2  in the atmosphere which help to reduce greenhouse effect and global warming. (b) Forests reduce environmental temperature which increases the rate of photosynthesis in plants in the surrounding regions. (c) Some of the trees have the ability to absorb harmful gases present in the atmosphere, e.g., Jamun trees can absorb compounds of lead easily. (ii) Influence of forests in controlling the quality of soil : (a) The roots of trees prevent erosion of topsoil (b) Forests also regulate biogeochemical cycles (c) Many of the decomposing bacteria and nitrogen-fixing bacteria live in close association with the roots of the trees. (iii) Control the quality of water : (a) Forests help in returning pure water back to the surface of Earth through rains. (b) Forests help in maintaining the water cycle as well as water resources of the Earth.

Question. Mention any three human activities which are responsible for water pollution. Answer. (i) Excessive use of fertilizers and pesticides. (ii) Disposal of industrial waste which contains poisonous substances into nearby water bodies. (iii) Sewage discharged into sewers from household/ domestic units. (iv) Synthetic soap and detergents used during washing in household units. (v) Hot water released from industrial units.

Question. (a) Explain the formation of acid rain. (b) What does the presence of smog in an area indicate? Answer. (a) Acid rain is the rainwater which have excessive amount of acids/i.e., sulphuric acid and nitric acid. These acids are formed by the reaction of oxides of sulphur and nitrogen with water. The oxides of sulphur and nitrogen are produced by combustion of fossil fuels in industries, automobiles, thermal power plants and domestic appliances, etc. The sulphur and nitrogen, present in fossil fuels form these oxides by reacting with oxygen of air by the process of combustion. (b) The presence of smog in an area indicates the high percentage of smoke released in the air by combustion of fossil fuel in industries or automobiles. It is an indicator of air pollution.

Question. (a) What is the outermost layer of our Earth called? (b) How is this important to life forms? (c) Name four factors that help in the formation of soil from rocks. Answer. (a) The outermost layer of our Earth is called crust.The outer crust of Earth is called lithosphere. (b) The living forms get all substances of their requirement for supporting life form this region. (c) (i) Winds, (ii) Water, (iii) Living organisms, (iv) Temperature variations (due to solar radiation).

Question. How does nitrogen fixation take place during lightning?How do plants make use of the nitrates and nitrites present in soil? Answer.

Natural Resources Chapter 14 Class 9 Science Assignments

Figure: Nitrogen Cycle in Nature The high temperatures and pressure created in the air convert nitrogen into oxides of nitrogen during lightning. These oxides dissolve in water to give nitrous and nitric acids that fall on land with rain.Nitrogen fixing bacteria which are found in the roots of leguminous plants convert atmospheric nitrogen into nitrate (the usable form by plants).The plants use nitrogen in the form of nitrates and nitrites to form amino acids and proteins. The plants are used as food by animals. The bacteria convert these compounds of nitrogen into nitrates and nitrites, after the death of plants and animals. Some other types of bacteria convert nitrites and nitrates into molecular nitrogen, which escapes into atmosphere and becomes a part of it.

Question. ‘A change in temperature in the water body affects aquatic organisms.’ Explain in brief. Answer. Change in the water temperature can affect the aquatic life in the following ways : It can encourage the growth of some life forms and harm some other life forms. This affects the balance between various organisms which had been established in that system.This can lead to removal of desirable substances like oxygen and other nutrients from water bodies. The eggs and larvae of various animals are particularly susceptible to temperature changes.So such aquatic life forms may become extinct from the related water bodies. Thus, the breeding of aquatic organisms will be affected.

Question. Write in brief the harmful effects of water pollution. Answer. (i) Causes water borne disease. (ii) Destroys microorganisms thereby affecting self purification of water. (iii) Decreases amount of dissolved O 2  in water bodies. (iv) Changes the temperature of water, oceans, leading to melting of polar ice. (v) Disturbs aquatic life. (vi) Kills aquatic organisms.

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Private US spacecraft enters orbit around the moon ahead of landing attempt

This image from video provided by SpaceX via NASA TV shows Intuitive Machines' lunar lander separating from the rocket's upper stage and heading toward the moon, on Feb. 15, 2024. (SpaceX -NASA TV via AP)

This image from video provided by SpaceX via NASA TV shows Intuitive Machines’ lunar lander separating from the rocket’s upper stage and heading toward the moon, on Feb. 15, 2024. (SpaceX -NASA TV via AP)

FILE - This photo provided by Intuitive Machines shows the company’s IM-1 Nova-C lunar lander in Houston in October 2023. The company aims to launch the lander in mid-February 2024, on a SpaceX rocket. (Intuitive Machines via AP, File)

A SpaceX Falcon 9 rocket lifts off from pad 39A at Kennedy Space Center in Cape Canaveral, Fla., early Thursday, Feb. 15, 2024. The rocket is carrying Intuitive Machines’ lunar lander on its way to the moon. If all goes well, a touchdown attempt would occur Feb. 22, after a day in lunar orbit. (AP Photo/John Raoux)

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CAPE CANAVERAL, Fla. (AP) — A private U.S. lunar lander reached the moon and eased into a low orbit Wednesday, a day before it will attempt an even greater feat — landing on the gray, dusty surface.

A smooth touchdown would put the U.S. back in business on the moon for the first time since NASA astronauts closed out the Apollo program in 1972. The company, if successful, also would become the first private outfit to ace a moon landing.

Launched last week , Intuitive Machines’ lander fired its engine on the back side of the moon while out of contact with Earth. Flight controllers at the company’s Houston headquarters had to wait until the spacecraft emerged to learn whether the lander was in orbit or hurtling aimlessly away.

Intuitive Machines confirmed its lander, nicknamed Odysseus, was circling the moon with experiments from NASA and other clients. The lander is part of a NASA program to kickstart the lunar economy; the space agency is paying $118 million to get its experiments on the moon on this mission.

South Korean Air Force's Black Eagles aerobatic team performs during the first day of the Singapore Airshow in Singapore, Tuesday, Feb. 20, 2024. (AP Photo/Vincent Thian)

On Thursday, controllers will lower the orbit from just under 60 miles (92 kilometers) to 6 miles (10 kilometers) — a crucial maneuver occurring again on the moon’s far side — before aiming for a touchdown near the moon’s south pole. It’s a dicey place to land with all the craters and cliffs, but deemed prime real estate for astronauts since the permanently shadowed craters are believed to hold frozen water.

The moon is littered with wreckage from failed landings. Some missions never even got that far. Another U.S. company — Astrobotic Technology — tried to send a lander to the moon last month, but it didn’t get there because of a fuel leak. The crippled lander came crashing back through the atmosphere , burning up over the Pacific.

A rundown on the moon’s winners and losers:

FIRST VICTORIES

The Soviet Union’s Luna 9 successfully touches down on the moon in 1966, after its predecessors crash or miss the moon altogether. The U.S. follows four months later with Surveyor 1. Both countries achieve more robotic landings, as the race heats up to land men.

APOLLO RULES

NASA clinches the space race with the Soviets in 1969 with a moon landing by Apollo 11’s Neil Armstrong and Buzz Aldrin. Twelve astronauts explore the surface over six missions, before the program ends with Apollo 17 in 1972. Still the only country to send humans to the moon, the U.S. hopes to return crews to the surface by the end of 2026 or so, a year after a lunar fly-around by astronauts.

CHINA EMERGES

China, in 2013, becomes the third country to successfully land on the moon, delivering a rover named Yutu, Chinese for jade rabbit. China follows with the Yutu-2 rover in 2019, this time touching down on the moon’s unexplored far side — an impressive first. A sample return mission on the moon’s near side in 2020 yields nearly 4 pounds (1.7 kilograms) of lunar rocks and dirt. Another sample return mission should be launching soon, but this time to the far side. Seen as NASA’s biggest moon rival, China aims to put its astronauts on the moon by 2030.

RUSSIA STUMBLES

In 2023, Russia tries for its first moon landing in nearly a half-century, but the Luna 25 spacecraft smashes into the moon. The country’s previous lander — 1976’s Luna 24 — not only landed, but returned moon rocks to Earth.

INDIA TRIUMPHS ON TAKE 2

After its first lander slams into the moon in 2019, India regroups and launches Chandrayaan-3 (Hindi for moon craft) in 2023. The craft successfully touches down , making India the fourth country to score a lunar landing. The win comes just four days after Russia’s crash-landing.

JAPAN LANDS SIDEWAYS

Japan becomes the fifth country to land successfully on the moon, with its spacecraft touching down in January. The craft lands on the wrong side, compromising its ability to generate solar power, but manages to crank out pictures and science before falling silent when the long lunar night sets in.

PRIVATE TRIES

A privately funded lander from Israel, named Beresheet, Hebrew for “in the beginning,” crashes into the moon in 2019 . A Japanese entrepreneur’s company, ispace, launches a lunar lander in 2023, but it, too, wrecks. Astrobotic Technology, a Pittsburgh company, launches its lander in January, but a fuel leak prevents a landing and dooms the craft. Astrobotic and Intuitive Machines plan more moon deliveries.

The Associated Press Health and Science Department receives support from the Howard Hughes Medical Institute’s Science and Educational Media Group. The AP is solely responsible for all content.

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Odysseus, a Private Lunar Lander, Launches Toward the Moon

A SpaceX rocket lifted the spacecraft, which was built by Intuitive Machines of Houston to carry cargo for NASA and other customers to the lunar surface.

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SpaceX Launches Robotic Lunar Lander

The odysseus spacecraft is from the houston company intuitive machines and weighs about 4,200 pounds with a full load of propellant..

Three, two, one, ignition and liftoff. Go SpaceX. Go IM-1 and the Odysseus lunar lander. Vehicle pitching down range. Stage one propulsion is nominal. Falcon 9 has successfully lifted off from pad 39A at Kennedy Space Center carrying the IM-1 payload. IM-1 Odysseus lunar lander separation confirmed. What an incredible sight to see the IM-1 Nova-C lunar lander drifting away from Falcon 9’s second stage, confirming spacecraft separation.

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By Kenneth Chang

Kenneth Chang so far this year has reported on two moon missions, one successful and the other less so .

Another month, another try at the moon.

A robotic lunar lander launched into space early Thursday morning. If all goes well, on Feb. 22 it will become the first American spacecraft to gently set down on the moon’s surface since the Apollo 17 moon landing in 1972 .

It would also become the first private effort to reach the surface of the moon in one piece. Three earlier attempts, by an American company , a Japanese company and an Israeli nonprofit , failed.

The company in charge of this mission, Intuitive Machines of Houston, is optimistic.

“I feel fairly confident that we’re going to be successful softly touching down on the moon,” Stephen Altemus, the president and chief executive of Intuitive Machines, said in an interview. “We’ve done the tests. We tested and tested and tested. As much testing as we could do.”

A metallic spacecraft sits on a yellow stand in a large room with an American flag on the back wall.

If private companies can pull off this feat, at a cost much lower than a traditional NASA mission, that will open the door to wider exploration of the moon by NASA and commercial endeavors.

“We’re trying to create a marketplace in a place where it didn’t exist,” Joel Kearns, an official in NASA’s science mission directorate, said during a news conference on Tuesday. “But to do that, we have to do it in a cost-conscious manner.”

NASA is the primary customer for this mission, paying Intuitive Machines $118 million to take its payloads, which include a stereo camera to observe the plume of dust kicked up during landing and a radio receiver to measure the effects of charged particles on radio signals, to the moon’s surface. There is also cargo from customers other than NASA, like a camera built by students at Embry-Riddle Aeronautical University in Daytona Beach, Fla., and an art project by Jeff Koons .

But if these private efforts continue to crash, then NASA will not be getting its money’s worth.

The mission got off to a smooth, auspicious start.

At 1:05 a.m. Eastern time, a SpaceX Falcon 9 rocket carrying the lander lifted off from NASA’s Kennedy Space Center in Florida, sending the lander on a direct trajectory toward the moon. Intuitive Machines reported less than an hour later that the spacecraft separated from the rocket’s second stage and successfully turned itself on.

The spacecraft can keep itself pointed in the proper direction, its solar panels are generating power and it is in radio contact with Intuitive Machines’s mission control in Houston, the company said later on Thursday morning.

“We are keenly aware of the immense challenges that lie ahead,” Mr. Altemus said in a statement. “However, it is precisely in facing these challenges head-on that we recognize the magnitude of the opportunity before us: to softly return the United States to the surface of the moon for the first time in 52 years.”

Intuitive Machines calls its spacecraft design Nova-C. It is a hexagonal cylinder with six landing legs, about 14 feet tall and 5 feet wide. Intuitive Machines notes that the body of the lander is roughly the size of an old British police telephone booth — that is, like the Tardis in the “Doctor Who” science fiction television show.

At launch, with a full load of propellant, the lander weighed about 4,200 pounds.

This particular spacecraft was named Odysseus after a contest among Intuitive Machines employees. Mario Romero, the engineer who proposed the name, said the travels of the hero of the “Odyssey,” the ancient Greek epic poem, provided an apt analogy for the lunar mission.

“This journey takes much longer due to the many challenges, setbacks and delays,” Mr. Romero said in Intuitive Machines’ press kit for the mission. “Traveling the daunting, wine-dark sea repeatedly tests his mettle, yet ultimately, Odysseus proves worthy and sticks the landing back home after 10 years.”

After a week traveling away from Earth, Odysseus is to enter orbit around the moon about 62 miles above the surface. Then, 24 hours later, it will fire its engine to begin its final descent. An hour later, it is set down near a crater named Malapert A, about 185 miles from the south pole. The landing site is relatively flat, a location that is easier for a spacecraft to land.

The south polar region, especially craters that remain in perpetual shadow, has become an area of interest because of the presence of water ice there. Previous American moon missions have landed in the equatorial regions.

After landing, Odysseus is to operate for seven days until the sun sets. The solar-powered lander is not designed to survive the frigid cold of lunar night.

The launch of the Intuitive Machines mission comes just one month after another American company, Astrobotic Technology of Pittsburgh, attempted to send Peregrine, its lander, to the moon. But a malfunction with its propulsion system shortly after launch prevented any possibility of landing. Ten days later, as Peregrine swung back toward Earth, it burned up in the atmosphere above the Pacific Ocean.

Both Odysseus and Peregrine are part of NASA’s Commercial Lunar Payload Services program, or CLPS. The object of the program is to use commercial companies to send experiments to the moon rather than NASA building and operating its own moon landers.

The space agency hopes this approach will be much cheaper, allowing it to send more missions more frequently as it prepares to send astronauts back to the moon as part of its Artemis program.

Thomas Zurbuchen, the former associate administrator for science at NASA who started the CLPS program in 2018 , said the space agency expected half of the CLPS missions to fail and that he repeatedly told Congress, scientists and the companies to expect that. “That is how it was sold,” he said in an interview.

But even if half of these commercial missions fail, NASA would still come out ahead because a traditional mission costs $500 million to $1 billion, Dr. Zurbuchen said, while on a CLPS mission, NASA is paying a company about $100 million to fly its payloads.

Even a 50 percent success rate might be too optimistic. “Even if you’re an advocate for that, you have to see if that strategy is working,” Dr. Zurbuchen said.

Mr. Altemus, who worked six years as the director of engineering at NASA’s Johnson Space Center in Houston, said the drive to reduce costs has spurred a much quicker pace of innovation than was possible at NASA.

“Innovation that would not have occurred if we had more money and more time,” he said. “If you look at all the milestones leading up to landing on the moon, for all the technical accomplishments that we’ve been able to do for that little bit of money, it’s just amazing.”

The most difficult portion of the mission — landing — still lies ahead.

Mr. Altemus conceded that they needed to make decisions that reduced costs but raised risks.

“Now, have we gone too cheap?” Mr. Altemus said. “Possibly.”

If so, the CLPS companies may need to raise the prices for future missions, though they would still be cheaper than what NASA traditionally undertook. Mr. Altemus said that if Intuitive Machines fails this time, NASA and Congress should not give up on the moon-on-a-budget idea.

“It’s the only way to really go forward,” Mr. Altemus said.

Kenneth Chang has been at The Times since 2000, writing about physics, geology, chemistry, and the planets. Before becoming a science writer, he was a graduate student whose research involved the control of chaos. More about Kenneth Chang

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Science | SpaceX launch from Cape Canaveral marks 300th…

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Science | SpaceX launch from Cape Canaveral marks 300th successful Falcon 9 flight

A SpaceX Falcon 9 rocket launches from Cape Canaveral Space Force Station's Space Launch Complex 40 on Tuesday, Feb. 20, 2024. (Courtesy/SpaceX)

SpaceX completed the 11th launch from the Space Coast for the year under clear blue skies on Tuesday afternoon, marking the 300th successful orbital mission for a Falcon 9 rocket.

The workhorse for Elon Musk’s company lifted off from Cape Canaveral Space Force Station’s Space Launch Complex 40 at 3:11 p.m. carrying the Merah Putih 2 telecommunications satellite for Telkom Indonesia to a geosynchronous transfer orbit.

It marked the 301st flight of a Falcon 9 rocket since its debut in 2010 with all but one making it to orbit. That 2015 flight was a NASA resupply mission that exploded before reaching orbit, but it has since had 281 successful orbital flights.

The company has also flown its powerhouse Falcon Heavy rocket nine times since its debut in 2018 as well as two successful Falcon 1 rockets before Falcon 9 came on the scene. Named after the Millennium Falcon from “Star Wars,” it features nine of the company’s Merlin engines on the first stage.

Liftoff! pic.twitter.com/JdOTFjkLjA — SpaceX (@SpaceX) February 20, 2024

This was the 17th launch of the first-stage booster, and SpaceX made a recovery landing downrange on the Just Read the Instructions droneship in the Atlantic Ocean.

One of the most flown of SpaceX’s boosters, it previously launched the Crew-3 and Crew-4 human spaceflight missions among others. The record for booster launches so far is 19, but the company recently said it was working to certify its boosters for up to 40 reflights.

The landing marks the 275th time SpaceX has managed a successful recovery of either a Falcon 9 or Falcon Heavy booster, having nailed 200 attempts in row since it last missed a landing chance in February 2021.

Falcon 9 has landed on the Just Read the Instructions Droneship, completing this booster’s 17th launch and landing pic.twitter.com/q4Jwvo7dRA — SpaceX (@SpaceX) February 20, 2024

SpaceX has flown all but one of the launches from the Space Coast so far in 2023 with United Launch Alliance’s Vulcan Centaur having flown the other.

Elon Musk’s company has also flown six missions from California so far this year, so this flight will make it 16 across its three launch pads on both coasts as part of a year that could see as many as 150 launches.

That doesn’t include test launches from Texas of its in-development Starship and Super Heavy, which is gearing up for its third attempt at a successful suborbital launch as early as next month.

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A commercial company's lunar lander that launched from Kennedy Space Center last week has made a successful entry into the moon's orbit on Wednesday ahead of its Thursday attempt to stick the landing.

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The Space Coast set a new launch record in 2023 with 72 orbital missions from either Kennedy Space Center and Cape Canaveral Space Force Station. The pace of launches could ramp up by the end of 2024 to a near twice-weekly rate.

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NCERT Science Book Class 9

Ncert books for class 9 science – free pdf available.

NCERT Class 9 Science Books are interesting for students preparing for final exams. It is also an important year, as in the next class they will have to take the board exams. Whatever the students study as per the CBSE Class 9 syllabus will lay the foundation for their Class 10 board exams. Hence, the NCERT book for Class 9 Science will be crucial for them. These books are created by subject experts with a proper focus on detailed chapter-wise topics and concepts as per the CBSE syllabus for Class 9.

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NCERT Book for Class 9 Science Chapter-wise in English

Ncert book for class 9 science chapter-wise in hindi.

Access NCERT Solutions here to get answers to the questions present in the textbooks. Practising these solutions will give you the best results in exams.

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  1. Class 9 Science Assignments Download Pdf with Solutions

    All latest Kendriya Vidyalaya Class 9 Science Assignments with Answers and test papers are given below. Science Class 9 Assignments Pdf Download We have provided below the biggest collection of free CBSE NCERT KVS Assignments for Class 9 Science. Students and teachers can download and save all free Science assignments in Pdf for grade 9th.

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  5. NCERT Solutions for Class 9 Science Updated for 2023-24 Exams

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  7. NCERT Solutions For class 9 science

    NCERT Solutions for CBSE Class 9 Science consists of solutions from important concepts and topics such as Natural Resources, Sound, Energy and Work, Gravitation, Laws of Motion, Motion, Living Organism, Tissues, Atoms, Matter, and so on.

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    Chemistry Worksheets Class 9 on Chapter 3 Atoms and Molecules with Answers - Set 1. Atoms and molecules play an important role in chemical reactions. An atom is a small piece of matter that possesses the properties of the element. Some atoms exist independently of one another by forming ions and molecules. Molecules are formed when one or more ...

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    on December 9, 2023, 6:15 AM. Revised NCERT Solutions for Class 9 Science all chapters in Hindi and English Medium updated for session 2023-24. According to new rationalised NCERT Books published for 2023-24 exams, there are only 12 chapters in course. Class 9 Science NCERT solutions refer to the answers, explanations, and step-by-step ...

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  12. Natural Resources Chapter 14 Class 9 Science Assignments

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  13. Private US spacecraft enters orbit around the moon ahead of landing

    A SpaceX Falcon 9 rocket lifts off from pad 39A at Kennedy Space Center in Cape Canaveral, Fla., early Thursday, Feb. 15, 2024. The rocket is carrying Intuitive Machines' lunar lander on its way to the moon. ... The Associated Press Health and Science Department receives support from the Howard Hughes Medical Institute's Science and ...

  14. Odysseus, a Private Lunar Lander, Launches Toward the Moon

    The Intuitive Machines lander, named Odysseus, is scheduled to launch at 1:05 a.m. Eastern time on Wednesday on a SpaceX Falcon 9 rocket from NASA's Kennedy Space Center in Florida. The weather ...

  15. CBSE Class 9 Science Practicals

    CBSE Class 9 Science Practicals Syllabus - List of Experiments. 1) Preparation of: a) A true solution of common salt, sugar and alum. b) A suspension of soil, chalk powder and fine sand in water. c) A colloidal solution of starch in water and egg albumin/milk in water and distinguish between these on the basis of. transparency.

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  17. NASA Artemis Science, First Intuitive Machines Flight Head to Moon

    Through this flight to the Moon, they will provide insights into the lunar surface environment and test technologies for future landers and Artemis astronauts. At 1:05 a.m. EST on Thursday, Intuitive Machines' Nova-C lander launched on a SpaceX Falcon 9 rocket from Launch Complex 39A at the agency's Kennedy Space Center in Florida.

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    Class 9 Science NCERT Book Introduction. Chapter 1 Matter in Our Surroundings. NCERT Solutions for Class 9 Science. Chapter 2 Is Matter Around Us Pure. Chapter 3 Atoms and Molecules. Chapter 4 Structure of the Atom. Chapter 5 The Fundamental Unit of Life. Chapter 6 Tissues. Chapter 7 Diversity in Living Organisms.

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  20. SpaceX launch from Cape Canaveral marks 300th successful Falcon 9

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