Science
Class 9.

This chapter introduces the idea that everything around us is made of particles. You learn about the three states of matter—solid, liquid, and gas—and how temperature and pressure affect them. It helps you understand everyday changes like melting, evaporation, and condensation in a scientific way.

Here you explore mixtures, solutions, and types of substances. The chapter explains how to separate components of a mixture using simple methods and helps you understand the difference between pure and impure substances with real-life examples.

This chapter explains how matter is made up of tiny particles called atoms and molecules. You learn about laws of chemical combination, symbols, formula writing, and the basics of chemical reactions that form all materials around us.

You discover the inside of an atom—electrons, protons, and neutrons. The chapter explains different atomic models, how electrons are arranged, and how atomic number and mass number help identify elements.

This chapter introduces the cell, the smallest unit of life. You learn about cell structure, cell organelles, their functions, and how cells form the basis of all living organisms.

Here you study how similar cells group together to form tissues. The chapter explains plant and animal tissues, their types, functions, and importance in maintaining life processes.

This chapter explains how objects move. You learn concepts like distance, displacement, speed, velocity, and acceleration. Graphs of motion help you understand movement in a simple mathematical way.

You explore what causes motion—force. The chapter introduces Newton’s three laws of motion and explains inertia, action-reaction, and momentum with easy, real-life examples.

This chapter explains why objects fall to the ground and why planets revolve around the sun. You learn about universal gravitation, free fall, mass vs. weight, and buoyancy.

You learn how work is done and how energy changes from one form to another. The chapter explains kinetic and potential energy, the law of conservation of energy, and examples from daily life.

This chapter introduces how sound is produced, travels, and is heard. You learn about frequency, amplitude, wavelength, and applications like SONAR.

Here you study ways to improve crop production, animal husbandry, fisheries, and poultry. The chapter explains scientific techniques that help increase food quality and quantity.