NCERT Solutions for Class 9 Science

NCERT Chapter-wise Solutions Class 9 Science for Session (2025-26)
Chapter wise NCERT Solutions for Class 9 Science Download Free PDF
- Class 9 Science Chapter 1: The Matter in Our Environment
- Class 9 Science Chapter 2 Is Matter Around Us Pure – Term I
- Chapter 3: Term II Atoms and Molecules
- Class 9 Science Chapter 4 Atomic Structure Term II
- Class 9 Science Chapter 5: The Fundamental Unit of Life
- Class 9 Science Chapter 6: Tissues
- Class 9 Science Chapter 7: Living Organism Diversity
- Class 9 Science Chapter 8: Motion
- Class 9 Science Chapter 9: Force and Law of Motion
- Class 9 Science Chapter 10: Gravitation
- Class 9 Science Chapter 11: Work and Energy
- Class 9 Science Chapter 12: Sound
- Class 9 Science Chapter 13: Why Do We Fall Ill?
- Class 9 Science Chapter 14 – Natural Resources
- Class 9 Science Chapter 15: Improvements in Food Resources
- NCERT Class 9 Science Marks Breakdown Term-wise
FAQs on NCERT Solutions for Class 9 Science

NCERT Solutions for Class 9 Science Updated for 2025-26

By Karan Singh Bisht

Updated on 6 Jun 2025, 17:28 IST

NCERT Solutions for Class 9 Science: Students are looking for answers to the questions in your textbook, both the ones inside the chapters and at the very end, this is the place. It's super important for all Class 9th students.

These NCERT Class 9 Science Solutions have been carefully crafted by academic experts at Infinity Learn—India’s leading learning platform for JEE/NEET aspirants. Updated for the CBSE 2025–26 curriculum, these solutions are designed to help students build strong foundational concepts with ease and clarity.

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Infinity Learns giving you solutions for every chapter in the Class 9 Science Textbook. Students can use these solutions for Physics, Chemistry, and Biology parts of their Science Book when they're working on questions.

NCERT Solutions for Class 9 Science

NCERT solutions for Class 9 Science provided by Infinity Learn on this page are updated and aligned to the latest Class 9 Science syllabus prescribed by the CBSE Board for the academic year 2025-26.

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After the periodic curriculum review by the board, some topics may be added, removed or restructured, so it is important for students to study with the solutions that cover the revised syllabus accurately.

Science NCERT class 9 pdf of all 15 chapters given here are prepared after a thorough review of the latest CBSE Syllabus guidelines and contain answers following the most recent exam pattern. This makes them highly valuable study resources for students aiming to score well in their Class 9 Science exams in the current 2025-26 academic session.

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NCERT Chapter-wise Solutions Class 9 Science for Session (2025-26)

Here are the Class 9 Science NCERT Solutions. Just click on the chapter you need answers for:

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Chapter wise NCERT Solutions for Class 9 Science Download Free PDF

You can get free NCERT solutions for Class 9 Science here, broken down by each chapter. These PDFs are easy to download and use. We've made sure they match the latest study rules and exam styles. They're great to help you do well in your 2025-26 Science tests.

Detailed Analysis of NCERT Solutions of Class 9 Science Book All Chapter

Class 9 Science Chapter 1: The Matter in Our Environment

NCERT solutions for class 9 science chapter 1 "Matter in Our Surrounding." Everything we see is made out of stuff, referred to as matter. These objects have mass and take up space.

Particles make up matter, and these particulars are minuscule. Matter particles have space between them, are constantly moving, and attract. Solids, liquids, and gases are the three states of matter surrounding us.

Variations in the characteristics of the matter particles give rise to these states of matter. With the help of activities, all three states of matter have been thoroughly explained. Changing the temperature or pressure can alter the state of matter.

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Evaporation transforms a liquid into a vapor at any temperature below its boiling point. The evaporation rate is affected by the surface area exposed to the atmosphere, temperature, humidity, and wind speed.

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Class 9 Science Chapter 2 Is Matter Around Us Pure – Term I

The second chapter in the Class 9 Science Chapter 2 Is Matter Around Us Pure? builds on the concepts learned in the previous chapter Matter in Our Surroundings and provides an in-depth understanding of the classification, properties and separation techniques of mixtures and compounds.

The key topics covered in this chapter include elements, compounds and mixtures, types of mixtures such as homogeneous, heterogeneous, colloids, suspensions, properties of mixtures, separation techniques like evaporation, distillation, chromatography, solutions, concentration of solutions, and types of solutions - true, colloidal, suspensions.

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

Elements, compounds, and mixes are the three types of matter: colloids, suspensions, and heterogeneous and homogeneous mixes.

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Chapter 3: Term II Atoms and Molecules

Students will understand the laws of chemical combination, atoms, and molecules in class 9 science NCERT Chapter 3. They will learn how to create a chemical formula, the concepts of molecular mass, problems relating to these topics.

Chapter 3 Atoms and Molecules forms a crucial foundation in understanding atomic structure and chemical combinations. This chapter covers key topics including atoms, molecules, laws of chemical combination, writing chemical formulae, molecular mass and the mole concept. Several numerical problems are also included based on the mole concept.

The NCERT solutions chapter 3 class 9 provide invaluable assistance to students through detailed, step-wise solutions to all class 9 science textbook exercise questions. Additional revision notes summarize the key points for easy remembrance.

Exemplar problems from previous CBSE board exams give exposure to important questions. With the comprehensive NCERT solutions for this chapter, students can gain conceptual clarity on atoms, molecules and their chemical interactions.

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Class 9 Science Chapter 4 Atomic Structure Term II

Chapter 4 Structure of the Atom covers the evolution of atomic models proposed by scientists like Rutherford, Bohr and Chadwick. Key concepts include atomic structure, electron distribution, valency, atomic number and mass number. The class 9 science ncert solutions comprise detailed answers for class 9 science textbook questions, supplementary notes and exemplar problems from CBSE papers. These help gain clarity on atomic structure and enhance exam preparation.

Electrons, protons, neutrons, and the chemical formula of typical compounds make up the structure of atoms. Isotopes and isobars are two types of isotopes.

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Class 9 Science Chapter 5: The Fundamental Unit of Life

This chapter "The Fundamental Unit of Life" is part of the biology section. Students will learn that the cell is the most basic unit of life in this chapter. The entire chapter is centered on the cell and its structural organization, with students learning about the plasma membrane, cell wall, nucleus, cytoplasm, and animal cell structure. Topics covered in Chapter 5, The Fundamental Unit of Life for First Term in Class 9 Science:

Chapter 5 focuses on the cell as the basic unit of life. Topics covered include cell structure and functions, cell organelles, cell division and differences between plant and animal cells. The NCERT solutions contain solutions to textbook questions, revision notes and exemplar problems. These aid in understanding cell biology thoroughly.

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

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Class 9 Science Chapter 6: Tissues

This Class 9 Science Chapter 6 Tissues chapter begins with a simple definition of tissue and details of Plant and Animal Tissue, complete with pictures. Students will learn about the various plant and animal tissue types and describe each.

Chapter 6 Tissues: Topics Covered in Class 9 Science

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

Students learn about plant and animal tissues in this chapter - their types, structure and functions. The NCERT solutions class 9 science provide answers for textbook questions, extra questions, notes and previous years’ exemplar problems. These help students grasp the key concepts of this chapter efficiently.

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Class 9 Science Chapter 7: Living Organism Diversity

Living Organism Diversity Class 9 Science Chapter 7 covers topics like biological classification systems, hierarchy of categories, and five kingdoms of life. The NCERT solutions include class 9 science textbook exercises, extra questions, notes and exemplar problems to supplement learning. The classification of plants and animals is the subject of this chapter. All living organisms are grouped into five kingdoms: Monera, Protista, Fungi, Plantae, and Animalia.

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Class 9 Science Chapter 8: Motion

Motion,  speed with direction, rate of change of velocity, and graphical representation of motion are covered in NCERT Class 9 Science Chapter 8.

Chapter 8 Motion for First Term: Topics Covered in Class 9 Science:

Distance and displacement, velocity; uniform and non-uniform motion along a straight line; acceleration; distance-time and velocity-time graphs for uniform and uniformly accelerated motion; graphical derivation of equations of motion; the basic idea of uniform circular motion.

With the help of the well-explained theory and solved examples, students can gain clarity on concepts like equations of motion, uniform circular motion, velocity-time graphs, acceleration etc. Practicing the variety of questions builds skills in applying these concepts. The chapter notes and exemplar problems ensure comprehensive exam preparation.

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Class 9 Science Chapter 9: Force and Law of Motion

Class 9 Science Chapter 9 Force and Law of Motion overs significant physics topics including force and motion, Newton's laws of motion, inertia, momentum, the relationship between force and acceleration, action-reaction forces pairs and more.

This chapter 8 m0tion uses illustrations and examples to teach the three laws of motion. The three laws of motion are as follows:

According to the second law of motion leading to the second law of motion, the rate of change in the momentum of an object is proportional to the applied unbalanced force in the direction of the for.
Third rule of motion: Every action has an equal and opposite reaction, and they act on two separate bodies.

Force and Newton's Laws: Force and Motion, Newton's Laws of Motion, Action and Reaction Forces, Body Inertia, Inertia and Mass, Momentum, Force, and Acceleration Momentum conservation is a fundamental concept.

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Class 9 Science Chapter 10: Gravitation

Class 9 science Chapter 10 Gravitation explains the universal law of gravitation, gravitational force exerted by the earth (gravity), free fall, mass and weight, thrust and pressure, buoyancy, Archimedes' principle etc. Students can master challenging concepts like gravitational force, free fall, buoyancy etc. Solving the array of questions builds their problem-solving ability. The chapter notes and exemplar problems ensure thorough preparation for exams.

Students will learn about the universal law of gravitation and its importance in chapter 10 of NCERT Class 9 Science free fall, mass, weight, thrust pressure, Archimedes' principle, and relative density.

Gravitation: Gravitation; Universal Law of Gravitation; Earth's Gravitational Force (gravity); Gravitational Acceleration; Mass and Weight; Free Fall.

Other study resources for Class 9 Science Chapter 10:

Chapter 10 - Gravitation Class 9 Extra Questions

Class 9 Science Chapter 11: Work and Energy

Class 9 Science Chapter 11 Work and Energy includes topics like sound production, propagation, characteristics of sound waves, speed, reflection, reverberation, echoes, ultrasound, frequency ranges, applications of ultrasound, structure of the human ear etc.

The notion of work is defined in this chapter using various activities, numerical data, and examples. All types of energy are explained using examples. The topic of "rate of doing the work" concludes the chapter.

Work, energy, and power: Work done by a force, energy, and power; kinetic and potential energy; and the law of energy conservation.

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Class 9 Science Chapter 12: Sound

Chapter 12 Sound class 9 solutions comprises topics like sound production, propagation, characteristics of sound waves, speed, reflection, reverberation, echoes, ultrasound, frequency ranges, applications of ultrasound, structure of the human ear etc.

students can comprehend the physics of sound propagation, reflection, hearing etc. clearly. Solving the array of questions builds proficiency. The revision notes and exemplar problems facilitate exam preparation.

Other study resources for Class 9 Science Chapter 12:

An exemplar for Class 9 Science Solutions for NCERT Chapter 12 – Sound

Class 9 Science Chapter 13: Why Do We Fall Ill?

Chapter 13 of class 9 Science Why Do We Fall Ill focuses on health difficulties and diseases of various forms. It discusses health and failure, disease and its causes, and infectious diseases. This chapter has been added to help students become more aware of various ailments to better care for their health and stay fit and healthy.

Topics Covered in Class 9 Science Chapter 13: health, common diseases, infectious diseases, principles of treatment and prevention.

Health and Diseases: The Failure of Health The causes and symptoms of infectious and non-infectious diseases. Microbe-caused diseases (viruses, bacteria, and protozoans) and how to avoid them; treatment and preventative principles. Pulse Polio programs are aimed at reducing the number of cases of polio. The following materials are also allowing materials are also available for Class 9 Chapter 13, Why Do We Fall Ill.

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Class 9 Science Chapter 14 – Natural Resources

Natural resources have been bestowed upon us. These are necessary for all kinds of life on Earth to meet their basic needs. This chapter covers air, water, soil, the biogeochemical cycle, the importance of the ozone layer, and humans are damaging it.

Chapter 14 chapter Natural Resources class 9 solutions covers conservation of resources like forests, wildlife, coal, petroleum, natural gas, water, alternative energy sources etc.

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

Pollution of the air, water, and soil (brief introduction). Holes in the ozone layer and the potential consequences. Water, oxygen, carbon, and nitrogen are all part of the biogeochemical cycles in nature.

Other study resources for Class 9 Science Chapter 14:

Class 9 Science Chapter 15: Improvements in Food Resources

The Class 9 Science chapter 15 Improvement in Food Resources of NCERT is the last chapter that explains crop improvement methods, protection, animal husbandry, pisciculture, apiculture, animal breeding, biofortification, single cell protein etc.

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well-explained solutions provide better grasp of crop improvement and animal husbandry methods. Solving additional questions improves retention. The notes and exemplars ensure robust exam preparation.

Visit NCERT Science Book Class 9 to download the entire book in PDF format. Sign up for Infinity Learn learning app to get more practice exams and mock tests. For test preparation and a better knowledge of the topics, students can download worksheets, assignments, class 9 science textbook, notes, and study materials.

NCERT Class 9 Science Marks Breakdown Term-wise

You can find the marks split-up for Class 9 Science here, for each term. These details are easy to understand and follow. They match the latest guidelines, helping you know how scores are divided for your 2025-26 Science exams.

Class 9 Marks Breakdown for Term I

Units	Term - I	Marks
I	Matter – Its nature and Behaviour – Chapter 2	18
II	Organization in the living world – Chapters 5 and 6	08
III	Motion, work, and force – Chapters 8 and 9	14

Class 9 Marks Breakdown for Term II

Units	Term - II	Marks
I	Matter – Its nature and Behaviour – Chapters 3 and 4	18
II	Organization in the living world – Chapter 13	08
III	Motion, work, and force – Chapters 10 and 11	14
Total Theory (Term I + II)		10
Internal review – Term II		80
Total		100

There are numerous features of NCERT solutions for class 9th Science, which are listed below:

NCERT Solutions for CBSE Class 9 Science are given to everyone for free.
It covers all of the Class 9 textbook's exercise problems.
Additional questions, exemplar problems, key questions from previous year's question papers and sample papers, worksheets, MCQs, short answer questions, descriptive type questions, solutions, and tips and techniques are included.
CBSE Class 9 Science Solutions files are in PDF format for simple download.
Students can visualize the concepts with the help of diagrams.
The most effective answers are provided, which can aid in exam success.

FAQs on NCERT Solutions for Class 9 Science

Is Class 9 Science easy?

With dedication and the right materials like NCERT, Class 9 Science can be understood easily. It's all about consistent study.

Which is the most interesting chapter in class 9 science?

The most interesting chapter in class 9 science are - Matter in Our Surrounding, Is Matter Around Us Pure, Atoms and Molecules, Structure of Atom, The Fundamental Unit of Life, Tissue, Why do we fall ill and Natural Resources.

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

Absolutely. NCERT Solutions for Class 9 Science provides a comprehensive guide for exam preparation. It's a trusted resource.

Is Class 9 science important?

For students of Class 9, Maths and Science are equally important subjects.

Which is the hardest subject in 9th?

Physics is often considered a difficult subject by many students. It demands a good understanding of concepts and regular practice. Class 9th Physics syllabus covers topics like motion, force, energy, and sound, which can be challenging for some students.