Class 9 – 10 · subject library

High School Science

Chapter notes, previous year papers, sample tests and Q&A for science — across CBSE, ICSE, IB and state boards. Free.

12 chapters~465 min read Free · printable

📌 Board-specific:CBSE Science ICSE Science ISC Science IB Science

Chapters

12 chapters — sequenced for revision.

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Matter in Our Surroundings

From the air you breathe to the ice in your glass — everything around you is matter. Class 9 Matter in Our Surroundings with the particle theory, the three classical states, the curious fourth and fifth states (plasma and Bose-Einstein condensate), latent heat, evaporation, and 25+ exam-style problems with full step-by-step solutions.

CBSE⏱ 35 minRead chapter

Is Matter Around Us Pure?

Almost nothing in everyday life is chemically "pure" — your air is a mixture, your milk is a colloid, your salt water is a solution. Class 9 Is Matter Around Us Pure? distinguishes pure substances, mixtures, solutions, suspensions, colloids; the Tyndall effect; concentration calculations; and separation techniques with 20+ exam-style problems.

CBSE⏱ 30 minRead chapter

Atoms and Molecules

The atom is the indivisible building block — except when it isn't. Class 9 Atoms and Molecules with Dalton's atomic theory, laws of chemical combination, atomic and molecular masses, the mole concept, Avogadro's number, formula writing, and 25+ exam-style numericals with full step-by-step solutions.

CBSE⏱ 40 minRead chapter

Structure of the Atom

Dalton thought atoms were indivisible. He was wrong. Class 9 Structure of the Atom covers Thomson's plum-pudding model, Rutherford's gold-foil experiment, Bohr's planetary atom, the discovery of the neutron, electron-configuration rules, isotopes & isobars, valency and 25+ exam-style problems with full step-by-step solutions.

CBSE⏱ 40 minRead chapter

The Fundamental Unit of Life

Every living organism — from a bacterium to a blue whale — is built from cells. Class 9 The Fundamental Unit of Life covers cell theory, discovery of cells, prokaryotes vs eukaryotes, plant vs animal cells, the structure & function of every cell organelle, osmosis and diffusion in cells, with 20+ exam-style problems and step-by-step explanations.

CBSE⏱ 35 minRead chapter

Tissues

A leaf isn't just one kind of cell repeated — it's a team. Class 9 Tissues covers plant tissues (meristematic, simple permanent, complex permanent — xylem, phloem) and animal tissues (epithelial, connective, muscular, nervous) with structures, locations, functions and 20+ exam-style diagram and identification problems.

CBSE⏱ 35 minRead chapter

Motion

How fast? In what direction? How far? Class 9 Motion covers reference frames, distance vs displacement, speed vs velocity, acceleration, three equations of motion derived graphically, uniform circular motion, and 25+ exam-style numericals with full step-by-step solutions and worked graph problems.

CBSE⏱ 45 minRead chapter

Force and Laws of Motion

A push, a pull, a kick — every change in motion comes from a force. Class 9 Force and Laws of Motion covers inertia, balanced vs unbalanced forces, Newton's three laws derived from everyday experience, momentum, conservation of momentum, and 25+ exam-style numericals with full step-by-step solutions.

CBSE⏱ 45 minRead chapter

Gravitation

The same force that pulls an apple to the ground keeps the moon in orbit. Class 9 Gravitation covers Newton's universal law, free fall and g, mass vs weight, thrust and pressure, buoyancy, Archimedes' principle, relative density, and 25+ exam-style problems with full step-by-step solutions.

CBSE⏱ 40 minRead chapter

Work and Energy

Doing work means transferring energy. Class 9 Work and Energy covers the scientific definition of work, the work-energy theorem, kinetic energy, potential energy, conservation of mechanical energy, power, commercial energy units (kWh), and 25+ exam-style numericals with full step-by-step solutions.

CBSE⏱ 40 minRead chapter

Sound

A clap, a song, a thunder — all are waves of compression and rarefaction travelling through air. Class 9 Sound covers wave properties (frequency, wavelength, amplitude), the speed of sound, reflection, echoes, SONAR, ultrasound applications, the human ear, and 25+ exam-style numericals with full step-by-step solutions.

CBSE⏱ 40 minRead chapter

Improvement in Food Resources

India feeds 1.4 billion people from limited land. Class 9 Improvement in Food Resources covers crop variety improvement, fertilisers vs manure, irrigation, cropping patterns, organic farming, animal husbandry (cattle, poultry, fish, bees), and 20+ exam-style problems with full step-by-step solutions.

CBSE⏱ 40 minRead chapter