How to prepare for CBSE Class 9 Science — a chapter-by-chapter guide

The new "Exploration" textbook

CBSE replaced the legacy Class 9 NCERT Science textbook with a single integrated book called Exploration — 12 chapters spanning all three streams (Physics, Chemistry, Biology). It's more narrative, more application-oriented, and noticeably more visually rich than the old book.

Here's how to prepare by stream.

Chemistry — 3 chapters, ~25 marks potential

1. Matter in Our Surroundings — latent heat, evaporation, sublimation. Lots of 2-markers.
2. Is Matter Around Us Pure — mixtures vs pure substances, separation techniques. Diagram-heavy.
3. Atoms and Molecules — the single hardest Class 9 chemistry chapter. Mole concept, atomic mass, molecular mass. Do every worked example twice.
4. Structure of the Atom — Thomson, Rutherford, Bohr models. Valency. Isotopes.

Pro tip: Chemistry numerical problems on mole concept are the most common "discriminator" questions. If your child wants 95+, they must nail this.

Physics — 5 chapters, ~30 marks potential (heaviest stream)

1. Motion — the three equations of motion, distance-time and velocity-time graphs. Master the graphs first.
2. Force and Laws of Motion — Newton's three laws. Conservation of momentum. Lots of derivation-type questions.
3. Gravitation — Newton's law of gravitation, free fall, thrust and pressure, Archimedes' principle. A lot of application numericals.
4. Work and Energy — work-energy theorem, KE and PE formulae, conservation of energy, power.
5. Sound — properties of sound, SONAR, human ear. More descriptive than the others; diagrams are critical.

Pro tip: Make a single A4-page "derivation sheet" — every derivation (v² − u² = 2as, F = ma, W = F·s, KE = ½mv², P = W/t). Revise it weekly.

Biology — 3 chapters, ~25 marks potential

1. The Fundamental Unit of Life — cell theory, organelles (each one tested), prokaryotic vs eukaryotic. Diagram of animal and plant cell is almost guaranteed.
2. Tissues — plant vs animal tissues, each subtype. High memorisation load.
3. Improvement in Food Resources — crop production, animal husbandry. More applied, less memorisation.

Pro tip: Biology is almost entirely diagram-recall. Draw every diagram by hand three times. Label everything. The NCERT diagrams themselves appear on exam papers.

The 4-week pre-exam routine

• Week 4: Read all 12 chapters once. No practice.
• Week 3: Solve every NCERT in-text and exercise question.
• Week 2: Solve NCERT Exemplar + last 3 years' CBSE sample papers.
• Week 1: Revise only. Derivation sheet, formula sheet, diagrams.

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