NCERT Solutions for Class 9 Science

NCERT Solutions for Class 9 Science Updated for 2021-22 Free Chapterwise PDF Download

NCERT Solutions for Class 9 Science help students to clear any doubts instantly and in a more efficient way. 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 which later leads to confusion. 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, Atom, 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 extra questions, exemplar problems, the important questions from previous year question papers, sample papers, worksheets, MCQ’s, 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 textbooks start with the chapter “Matter In Our Surrounding”. Everything that we see around us is made up of material which is called a matter. These things occupy space and have mass. Earlier, Indian philosopher had classified matter into 5 basic elements, Panch Tatva – air, water, earth, sky and fire. Now, modern scientists have evolved 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.

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

• Matter In Our Surroundings Class 9 Notes – Chapter 1
• CBSE Class 9 Science Chapter 1 Matter In Our Surroundings Important Questions
• NCERT Exemplar Class 9 Science Solutions for Chapter 1 – Matter In Our Surroundings

Chapter 2: Is Matter Around Us Pure – Term I

This chapter of NCERT Class 9 Science students will study about the mixture, solution, properties of solutions, separation of mixtures, 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.

Topics Covered in Class 9 Science Chapter 2 Is Matter Around Us Pure  for First Term:

Nature of matter: Elements, compounds and mixtures. Heterogeneous and homogenous mixtures,
colloids and suspensions.

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

• CBSE Class 9 Science Chapter 2 Is Matter Around Us Pure Notes
• Important Questions for CBSE Class 9 Science Chapter 2 – Is Matter Around Us Pure
• NCERT Exemplar Class 9 Science Solutions for Chapter 2 – Is Matter Around Us Pure

Chapter 3: Atoms and Molecules – Term II

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  for Second Term:

Particle nature and their basic units: Atoms and molecules, Law of constant proportions, Atomic
and molecular masses. Mole concept: Relationship of mole to mass of the particles and numbers.

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

• Atoms And Molecules Class 9 Notes – Chapter 3
• Important Questions for Class 9 Science Chapter 3 – Atoms and Molecules
• NCERT Exemplar Class 9 Science Solutions for Chapter 3 – Atoms And Molecules

Chapter 4: Structure of the Atom – Term II

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  for Second Term:

Structure of atoms: Electrons, protons and neutrons, valency, chemical formula of common
compounds. Isotopes and Isobars.

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

• Structure Of The Atom Class 9 CBSE Notes – Chapter 4
• Important Questions of CBSE Class 9 Science Chapter 4 – Structure of the Atom
• NCERT Exemplar Class 9 Science Solutions for Chapter 4 – Structure Of The Atom

Chapter 5: The Fundamental Unit of Life – Term I

This chapter is related to the Biology part. 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  for First Term:

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:

• The Fundamental Unit Of Life Class 9 CBSE Notes – Chapter 5
• Revision Notes For Class 9 Science Chapter 5 The Fundamental Unit of Life
• NCERT Exemplar Class 9 Science Solutions for Chapter 5 – The Fundamental Unit Of Life

Chapter 6: Tissues – Term I

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  for First Term:

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:

• Tissues Class 9 CBSE Notes – Chapter 6
• Revision Notes For Class 9 Science Chapter 6 Tissues
• NCERT Exemplar Class 9 Science Solutions for Chapter 6 – Tissues

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:

• Diversity In Living Organisms Class 9 CBSE Notes – Chapter 7
• Important Questions for CBSE Class 9 Science Chapter 7 – Diversity in Living Organisms
• NCERT Exemplar Class 9 Science Solutions for Chapter 7 – Diversity In Living Organisms

Chapter 8: Motion – Term I

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  for First Term:

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, derivation of equations of motion by graphical method; elementary idea of uniform circular motion.

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

• CBSE Class 9 Physics Motion Notes
• NCERT Exemplar Class 9 Science Solutions for Chapter 8 – Motion

Chapter 9: Force and Law of Motion – Term I

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  for First Term:

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. Elementary idea of
conservation of Momentum.

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

• Force And Laws Of Motion Class 9 CBSE Notes – Chapter 9
• Revision Notes For Class 9 Science Chapter 9 Force and Laws of Motion
• NCERT Exemplar Class 9 Science Solutions for Chapter 9 – Force And Laws Of Motion

Chapter 10: Gravitation – Term II

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  for Second Term:

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

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

• Gravitation Class 9 CBSE Notes – Chapter 10
• Revision Notes For Class 9 Science Chapter 10 Gravitation
• NCERT Exemplar Class 9 Science Solutions for Chapter 10 – Gravitation

Chapter 11: Work and Energy  – Term II

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 the work”.

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

Work, energy and power: Work done by a Force, Energy, power; Kinetic and Potential energy;
Law of conservation of energy.

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

• Work And Energy Class 9 CBSE Notes – Chapter 11
• Revision Notes For Class 9 Science Chapter 11 Work and Energy
• NCERT Exemplar Class 9 Science Solutions for Chapter 11 – Work And Energy

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.

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

• CBSE Class 9 Science Chapter 12 Sound Notes
• Important Questions for CBSE Class 9 Science Chapter 12 – Sound
• NCERT Exemplar Class 9 Science Solutions for Chapter 12 – Sound

Chapter 13: Why Do We Fall Ill – Term II

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.

Topics Covered in Class 9 Science Chapter 13 Why Do We Fall Ill  for Second Term:

Health and Diseases: Health and its failure. Infectious and Non-infectious diseases, their causes and
manifestation. Diseases caused by microbes (Virus, Bacteria and Protozoans) and their prevention;
Principles of treatment and prevention. Pulse Polio programmes.

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

• Why Do We Fall Ill Class 9 CBSE Notes – Chapter 13
• Important Questions for CBSE Class 9 Science Chapter 13 – Why do we fall ill
• NCERT Exemplar Class 9 Science Solutions for Chapter 13 – Why Do We Fall Ill

Chapter 14: Natural Resources – Only for Internal Assessment

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.

Topics Covered in Class 9 Science Chapter 14 Natural Resources  for Internal Assessment:

Physical resources: Air, Water, Soil. Air for respiration, for combustion, for moderating temperatures; movements of air and its role in bringing rains across India.
Air, water and soil pollution (brief introduction).Holes in ozone layer and the probable damages.
Bio-geo chemical cycles in nature: Water, Oxygen, Carbon and Nitrogen.

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

• Natural Resources Class 9 CBSE Notes – Chapter 14
• Revision Notes For Class 9 Science Chapter 14 Natural Resources
• NCERT Exemplar Class 9 Science Solutions for Chapter 14 – Natural Resources

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:

• Improvement In Food Resources Class 9 CBSE Notes – Chapter 15
• Important Questions for CBSE Class 9 Science Chapter 15 – Improvement in food Resources
• Revision Notes For Class 9 Science Chapter 15 Improvement in Food Resources
• NCERT Exemplar Class 9 Science Solutions for Chapter 15 – Improvement In Food Resources

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) –

Features of NCERT 9^th 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, MCQ’s, 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.