NCERT Solutions for CBSE Class 9 Science (2026-27)
NCERT Solutions for Class 9 Science give you the correct answer to every question in your Science textbook. Each answer is written step by step, in simple language, so you can understand it on your own. You can use these solutions for homework, unit tests and the final exam.
From the 2026-27 session, CBSE has brought in a new NCERT Science book for Class 9. The book is called Exploration. It has 13 chapters. Physics, Chemistry, Biology and Earth Science are now mixed together in one book instead of being kept in separate sections. Our solutions follow this new book, chapter by chapter.
Quick look
Board: CBSE
Class: 9
Subject: Science
Book: Exploration (NCERT)
Chapters: 13
Session: 2026-27
Medium: English and Hindi
NCERT Solutions for Class 9 Science - All Chapters
Click on any chapter below to open the full solutions for that chapter. All in-text questions and exercise questions are covered.
| Chapter | Chapter Name | Subject Area |
|---|---|---|
| Chapter 1 | Exploration: Entering the World of Secondary Science | Basics of Science |
| Chapter 2 | Cell: The Building Block of Life | Biology |
| Chapter 3 | Tissues in Action | Biology |
| Chapter 4 | Describing Motion Around Us | Physics |
| Chapter 5 | Exploring Mixtures and their Separation | Chemistry |
| Chapter 6 | How Forces Affect Motion | Physics |
| Chapter 7 | Work, Energy and Simple Machines | Physics |
| Chapter 8 | Journey Inside the Atom | Chemistry |
| Chapter 9 | Atomic Foundations of Matter | Chemistry |
| Chapter 10 | Sound Waves: Characteristics and Applications | Physics |
| Chapter 11 | Reproduction: How Life Continues | Biology |
| Chapter 12 | Patterns in Life: Diversity and Classification | Biology |
| Chapter 13 | Earth as a System: Energy, Matter and Life | Earth Science |
What You Will Study in Each Chapter
Here is a short summary of every chapter. Read it before you start a chapter so you know what is coming.
Chapter 1: Exploration - Entering the World of Secondary Science
This is a new chapter. It explains how science actually works. You learn that science is not just a list of facts. It is a way of observing, asking questions and testing ideas. The chapter also covers scientific units, symbols and how to make a good estimate.
Chapter 2: Cell - The Building Block of Life
Every living thing is made of cells. This chapter covers the discovery of the cell, plant and animal cells, and the work done by each cell part such as the nucleus, mitochondria and cell membrane. You also study diffusion, osmosis and cell division (mitosis and meiosis).
Chapter 3: Tissues in Action
Cells of the same kind join to form a tissue. Here you learn plant tissues (meristematic and permanent) and the four animal tissues (epithelial, connective, muscular and nervous). The chapter also explains bones, joints and how the body moves.
Chapter 4: Describing Motion Around Us
This chapter starts Physics. You learn distance, displacement, speed, velocity and acceleration. You also learn to read and draw motion graphs, use the three equations of motion, and understand circular motion. Practise the numerical questions well.
Chapter 5: Exploring Mixtures and their Separation
Learn the difference between a pure substance and a mixture. The chapter covers solutions, suspensions, colloids, the Tyndall effect and how to find the concentration of a solution. It also covers ways of separating mixtures, such as crystallisation, distillation and chromatography.
Chapter 6: How Forces Affect Motion
A force can start motion, stop motion or change direction. You study balanced and unbalanced forces, friction, and Newton's three laws of motion with everyday examples. Momentum and the law of conservation of momentum are also covered.
Chapter 7: Work, Energy and Simple Machines
Work is done only when a force moves an object. This chapter covers work, kinetic energy, potential energy, the law of conservation of energy and power. Simple machines such as levers, pulleys and inclined planes are new additions in this book.
Chapter 8: Journey Inside the Atom
Atoms are made of even smaller particles. You study electrons, protons and neutrons, and the atomic models of Dalton, Thomson, Rutherford and Bohr. The chapter also covers atomic number, mass number, valency, isotopes and isobars.
Chapter 9: Atomic Foundations of Matter
This chapter explains the Law of Conservation of Mass and the Law of Constant Proportions. You learn Dalton's atomic theory, ionic and covalent bonding, how to write chemical formulae, and how to calculate molecular mass and formula unit mass.
Chapter 10: Sound Waves - Characteristics and Applications
Sound is made by vibration and needs a medium to travel. Learn wavelength, frequency, amplitude, time period and speed of sound. The chapter also covers pitch, loudness, echo, reverberation, SONAR and echolocation.
Chapter 11: Reproduction - How Life Continues
This chapter covers asexual and sexual reproduction in plants and in humans. Topics include pollination, fertilisation, seed dispersal, the human reproductive system and reproductive health.
Chapter 12: Patterns in Life - Diversity and Classification
Millions of living things exist on Earth. This chapter explains why we classify them and how. You study the five-kingdom classification, the main groups of plants and animals, binomial nomenclature and why biodiversity must be protected.
Chapter 13: Earth as a System - Energy, Matter and Life
This is a new Earth Science chapter. The Earth is treated as one connected system of five spheres: geosphere, hydrosphere, cryosphere, atmosphere and biosphere. You study solar energy, wind, the water, carbon, nitrogen and oxygen cycles, and how human activity affects them.
Still Using the Old NCERT Science Book?
Some schools may still be using the older Class 9 Science book. Check the first chapter of your book. If Chapter 1 is Matter in Our Surroundings, you are on the old book. If Chapter 1 is Exploration: Entering the World of Secondary Science, you are on the new book.
Solutions for the old 12-chapter book are here:
- Matter in Our Surroundings
- Is Matter Around Us Pure
- Atoms and Molecules
- Structure of the Atom
- The Fundamental Unit of Life
- Tissues
- Motion
- Force and Laws of Motion
- Gravitation
- Work and Energy
- Sound
- Improvement in Food Resources
How to Use These NCERT Solutions
Solutions help you most when you use them after trying, not before. Follow these five steps:
- Read the chapter first. Do not jump straight to the questions. Read the full chapter once, slowly.
- Try the questions on your own. Attempt every in-text question and exercise question yourself, even if the answer feels wrong.
- Now check the solution. Compare your answer with ours. Look at the steps, not only the final answer.
- Mark your mistakes. Keep one notebook for mistakes. Write the question and where you went wrong.
- Do them again after a week. Solve the same questions again without help. This is how the chapter stays in your memory.
Simple Study Plan for Class 9 Science
Class 9 Science has three subjects inside one book. If you study only one of them, your marks will fall. Give time to all three every week.
| Day | What to Do |
|---|---|
| Monday | Biology - read one topic and draw the diagram |
| Tuesday | Physics - solve numerical questions |
| Wednesday | Chemistry - learn formulae and definitions |
| Thursday | Biology - finish the exercise questions |
| Friday | Physics and Chemistry - clear your doubts |
| Saturday | Do the activities and Earth Science topics |
| Sunday | Revise the full week and take a short test |
Why Students Use Extramarks NCERT Solutions
- Answers follow the new Exploration textbook and the latest CBSE syllabus.
- Every answer is written step by step, the way a teacher would write it on the board.
- Both in-text questions and end-of-chapter exercise questions are covered.
- Numerical questions show the formula, the values used and the final answer with units.
- Language is simple, so you can study without help at home.
- Free to read on the Extramarks website and app, any time.