NCERT Solutions for Class 9 Science

NCERT Solutions for Class 9 Science Updated for 2022-23 Free Chapterwise PDF Download

NCERT Solutions for Class 9 Science help students to clear any doubts instantly and efficiently. These NCERT Solutions guide students to learn the important concepts which are included in the CBSE Class 9 Science syllabus. Students are required to solve the exercise questions included in the textbook to create a proper understanding of the topics.

While solving the textbook questions, doubts arise among students. The NCERT Solutions for Class 9 comes in handy at such times, as they include precise explanations and detailed answers to those questions. These CBSE Science NCERT Solutions for Class 9 cover solutions to all the important chapters included in the textbook like Matter, Atoms, Tissues, Living Organisms, Motion, Force, Laws of Motion, Gravitation, Energy and Work, Sound, Natural Resources, etc.

Along with answers to the textbook questions, these solutions provide you with extra questions, exemplar problems, the important questions from previous year question papers, sample papers, worksheets, MCQs, short answering questions, descriptive type questions, their solutions as well as tips and tricks.

NCERT Solutions for Class 9 Science Chapter-Wise PDFs

NCERT Solutions for Class 9 Science are provided in a format for better accessibility to the students. These solutions serve as an important studying tool for students who are preparing for their board examinations and assignments.

NCERT Solutions of Class 9 Science Book Chapter Brief

Chapter 1: Matter in Our Surrounding

The Class 9 science textbook starts with the chapter “Matter in Our Surroundings”. Everything that we see around us is made up of material which is called matter. These things occupy space and have mass. Earlier, Indian philosophers had classified matter into 5 basic elements called Panch Tatva – air, water, earth, sky and fire. Now, modern scientists have come up with 2 types of classification, i.e., based on physical property and chemical nature. In this chapter, students will learn about the physical properties of matter.

The matter is made up of particles and these particulars are very small. The particles of matter have space between them, they are continuously moving and attract each other. The matter around us exists in 3 different states – solids, liquids and gases. These states of matter arise due to variation in the characteristic of the particles of matter. All the 3 states of matters have been explained in-depth with the help of activities. Further, the textbook explains that the state of matter is inter-convertible. The state of matter can be changed by changing temperature or pressure. The phenomenon of change of a liquid into vapour at any temperature below its boiling point is called evaporation. The rate of evaporation depends upon the surface area exposed to the atmosphere, the temperature, the humidity and the wind speed. Evaporation also causes cooling.

Topics Covered in Class 9 Science Chapter 1 Matter in Our Surrounding :

Definition of matter; solid, liquid and gas; characteristics – shape, volume, density; change of state –  melting (absorption of heat), freezing, evaporation (cooling by evaporation), condensation, sublimation.

Also access the following resources for Class 9 Chapter 1 Matter in Our Surrounding at BYJU’S:

Chapter 2: Is Matter Around Us Pure?

This chapter of NCERT Class 9 Science students will teach about mixtures, solutions, properties of solutions, separation of mixtures, and physical and chemical changes. Along with this, they will also learn about compounds and their properties, the difference between mixtures and compounds, classification of matter, etc.

Topics Covered in Class 9 Science Chapter 2 Is Matter Around Us Pure?  :

Nature of matter: Elements, compounds and mixtures. Heterogeneous and homogenous mixtures, colloids and suspensions. Physical and chemical changes (excluding separating the components of a mixture).

Also access the following resources for Class 9 Chapter 2 Is Matter Around Us Pure? at BYJU’S:

Chapter 3: Atoms and Molecules

In NCERT Class 9 Science Chapter 3, students will learn the laws of chemical combination, atoms and molecules. They will get to know how to write a chemical formula, molecular mass and mole concepts and some numerical problems related to these concepts.

Topics Covered in Class 9 Science Chapter 3 Atoms and Molecules  :

Particle nature and their basic units: Atoms and molecules, Law of Chemical Combination, Chemical formula of common compounds, Atomic and molecular masses.

Also access the following resources for Class 9 Chapter 3 Atoms and Molecules at BYJU’S:

Chapter 4: Structure of the Atom

This chapter of NCERT Class 9 Science deals with the various atomic models of atoms that were proposed by different scientists. In addition to it, this chapter also covers electrons’ distribution in different orbits, calculation of valency, atomic number and mass number.

Topics Covered in Class 9 Science Chapter 4 Structure of the Atom  :

Structure of atoms: Electrons, protons and neutrons, Valency, Atomic Number and Mass Number, Isotopes and Isobars.

Also access the following resources for Class 9 Chapter 4 Structure of the Atom at BYJU’S:

Chapter 5: The Fundamental Unit of Life

This chapter is related to Biology. In this chapter, students will get to know that cell is the fundamental unit of life. The whole chapter revolves around the cell and its structural organisation, in which students will learn about plasma membrane, cell wall, nucleus, cytoplasm and structure of an animal cell.

Topics Covered in Class 9 Science Chapter 5 The Fundamental Unit of Life  :

Cell – Basic Unit of life : Cell as a basic unit of life; prokaryotic and eukaryotic cells, multicellular organisms; cell membrane and cell wall, cell organelles and cell inclusions; chloroplast, mitochondria, vacuoles, endoplasmic reticulum, Golgi apparatus; nucleus, chromosomes – basic structure, number.

Also access the following resources for Class 9 Chapter 5 The Fundamental Unit of Life at BYJU’S:

Chapter 6: Tissues

This chapter pertains to the basic definition of tissue and then elaborates on the Plant and Animal tissue with proper diagrams. Students will get to know the different types of plant and animal tissues with a detailed explanation of each.

Topics Covered in Class 9 Science Chapter 6 Tissues  :

Tissues, Organs, Organ System, Organism: Structure and functions of animal and plant tissues (only four types of tissues in animals; Meristematic and Permanent tissues in plants).

Also access the following resources for Class 9 Chapter 6 Tissues at BYJU’S:

Chapter 7: Diversity in Living Organism

This chapter deals with the classification of plants and animals. Students get to know that all living organisms are divided into 5 kingdoms namely Monera, Protista, Fungi, Plantae and Animalia. It also describes the classification and evolution, the hierarchy of classification.

Also access the following resources for Class 9 Chapter 7 Diversity in Living Organism at BYJU’S:

Chapter 8: Motion

NCERT Class 9 Science Chapter 8 describes motion, the speed with direction, rate of change of velocity, graphical representation of motion. Also, students will find the 3 equations of motion and numerical problems related to it. Overall, this chapter will be a mix of theory as well as the numerical part.

Topics Covered in Class 9 Science Chapter 8 Motion :

Motion: Distance and displacement, velocity; uniform and non-uniform motion along a straight line; acceleration, distance-time and velocity-time graphs for uniform motion and uniformly accelerated motion, elementary idea of uniform circular motion.

Also access the following resources for Class 9 Chapter 8 Motion at BYJU’S:

Chapter 9: Force and Law of Motion

This chapter explains the 3 laws of motions with the help of diagrams and examples. Below are the 3 laws of motions:

  1. First law of motion: An object continues to be in a state of rest or of uniform motion along a straight line unless acted upon by an unbalanced force.
  2. Second law of motion: The rate of change of momentum of an object is proportional to the applied unbalanced force in the direction of the force.
  3. Third law of motion: To every action, there is an equal and opposite reaction and they act on two different bodies.

Topics Covered in Class 9 Science Chapter 9 Force and Law of Motion  :

Force and Newton’s laws : Force and Motion, Newton’s Laws of Motion, Action and Reaction forces, Inertia of a body, Inertia and mass, Momentum, Force and Acceleration.

Also access the following resources for Class 9 Chapter 9 Force and Law of Motion at BYJU’S:

Chapter 10: Gravitation

In chapter 10 of NCERT Class 9 Science, students will learn the universal law of gravitation and its importance, free fall, mass, weight, thrust and pressure, Archimedes’ principle and relative density. Students will also find numerical problems related to these topics.

Topics Covered in Class 9 Science Chapter 10 Gravitation :

Gravitation: Gravitation; Universal Law of Gravitation, Force of Gravitation of the earth (gravity), Acceleration due to Gravity; Mass and Weight; Free fall.

Floatation: Thrust and Pressure. Archimedes’ Principle; Buoyancy.

Also access the following resources for Class 9 Chapter 10 Gravitation at BYJU’S:

Chapter 11: Work and Energy

In this chapter, the concept of work is defined with different activities, numerical and examples. The chapter also deals with energy and its different forms. Examples are given to explain all types of energy. The chapter ends with the topic “rate of doing work”.

Topics Covered in Class 9 Science Chapter 11 Work and Energy  :

Work, Energy and Power: Work done by a Force, Energy, power; Kinetic and Potential energy; Law of conservation of energy (excluding commercial unit of Energy).

Also access the following resources for Class 9 Chapter 11 Work and Energy at BYJU’S:

Chapter 12: Sound

Chapter 12 of CBSE Class 9 Science, deals with concepts such as production of sound, propagation of sound, the reflection of sound, range of hearing, applications of ultrasound, the structure of the human ear. A few numericals are also there in the chapter which can only be solved after understanding the concepts. So, students must grasp and study the chapter carefully.

Topics Covered in Class 9 Science Chapter 12 Sound :

Sound: Nature of sound and its propagation in various media, speed of sound, range of hearing in humans; ultrasound; reflection of sound; echo.

Also access the following resources for Class 9 Chapter 12 Sound at BYJU’S:

Chapter 13: Why Do We Fall Ill?

NCERT Class 9 Science chapter 13 deals with health issues and different types of diseases. It covers topics like; Health and its failure, disease and its cause, infectious diseases. This chapter is added to make students aware of different types of diseases so that they take care of their health and be fit and healthy.

Also access the following resources for Class 9 Chapter 13 Why Do We Fall Ill? at BYJU’S:

Chapter 14: Natural Resources

We are blessed with natural resources. These are essential to meet the basic requirements of all forms of life on Earth. So, this chapter has been included by NCERT to provide knowledge on types of resources available on the Earth. This chapter deals with the topics like air, water, soil, biogeochemical cycle and the ozone layer, its importance and how humans are polluting them.

Also access the following resources for Class 9 Chapter 14 Natural Resources at BYJU’S:

Chapter 15: Improvement in Food Resources

The last chapter of NCERT Class 9 Science covers topics like Improvement in crop yields, manure, fertilizer, storage of grains, animal husbandry. This chapter provides knowledge regarding agriculture, farming and dairy.

Also access the following resources for Class 9 Chapter 15 Improvement in Food Resources at BYJU’S:

To download the complete book in PDF format, visit NCERT Science Book Class 9. For more practice tests and mock tests sign up on BYJU’S the learning app. Apart from Science, get NCERT Solutions for all the subjects. Students can download worksheets, assignments, NCERT Books, notes and study materials for exam preparation and for a better understanding of the topics.

CBSE Class 9 Science Evaluation Scheme (Theory) –

Unit No. Unit Marks
I Matter-Its Nature and Behaviour 25
II Organization in the Living World 22
III Motion, Force and Work 27
IV Food; Food Production 06
Total Theory  80
Internal Assessment 20
Grand Total 100

Features of NCERT 9th Class Science Book Solutions

The book has a wide variety of features which are listed below:

  • CBSE Class 9 Science NCERT Solutions are available to everyone for free.
  • Covers all the exercise problems from the Class 9 textbook.
  • Consists of extra questions, exemplar problems, the important questions from previous year question papers and sample papers, worksheets, MCQs, short answering questions, descriptive type questions, their solutions and tips and tricks.
  • CBSE Class 9 Science Solutions files are available for download in PDF format for easy access.
  • Diagrams are included to help students visualize the topics.
  • Most effective solutions are given which can help to score well in the exams.

Frequently Asked Questions on NCERT Solutions for Class 9 Science

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

About 15 chapters are there in the Class 9 Science of NCERT Solutions. Students in Class 9 can refer to the solutions framed by the faculty at BYJU’S for a better understanding of the concepts. Class 9 is a very important step as the fundamental concepts help them to score well in the higher classes. NCERT Class 9 Science Activity Solutions also help students understand the applications of concepts in their daily lives.

Can I expect the questions from NCERT Solutions for Class 9 Science to be asked in the annual exam?

The NCERT Solutions for Class 9 Science contains all the questions present in the prescribed textbook. Most of the questions in the annual exam can be expected from the NCERT Solutions. So the students are advised to solve the questions in the textbook thoroughly for their exam preparation. The solutions at BYJU’S contain step-by-step explanations to help students ace the exam with much confidence. Understanding the method of answering questions will help them face the complex questions without any difficulty.

Is the NCERT Solutions for Class 9 Science sufficient for the exam preparation?

The NCERT Solutions for Class 9 Science is framed by the faculty at BYJU’S, keeping in mind the understanding abilities of students. The solutions are accurate and detailed to help students understand the complex topics easily. Shortcut techniques and tricks are also highlighted to make learning fun for the students. To get an overall idea about the concepts, students are recommended to understand the syllabus thoroughly before starting their exam preparation. The solutions not only help students with their annual exam preparation but also for various competitive exams both at the state and national level.

Why should students refer to the NCERT Solutions for Class 9 Science?

The NCERT Solutions for Class 9 Science are available for free download at BYJU’S. All the exercise questions from Class 9 textbook are answered by our expert faculty having vast experience in their respective subjects. The solutions can be accessed by the students while solving the textbook questions to understand the concepts effectively. The elaborate and detailed solutions with pictorial representation improves logical and analytical thinking abilities among students.

 

5 Comments

  1. Very good app

  2. Mohammed Hashim K S

    I am a subscriber and my feedback is that it really helped me to understand how the question’s answers came. Thank you Byju’s

  3. Very good app

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