CBSE Grade 9 Science Exam Survival Guide

Window: Annual Exam | Sections: Physics, Chemistry, Biology

Must-do topics

• Physics: Motion (u-v-a-t, graphs), Force & Newton’s laws, Gravitation (g, free fall), Work–Energy–Power
• Chemistry: Matter (states, diffusion), Atoms & Molecules (laws, mole concept basics), Structure of Atom (e/p/n, valency)
• Biology: Cell (organelles, differences), Tissues (plant vs animal), Diversity of Living Organisms, Health & Diseases basics

Top traps (avoid)

• Slope read wrong on v–t vs s–t graphs
• Unit slips: N/J/W; mole ↔ mass ↔ particles mix-ups
• Confusing plant vs animal tissue functions

Study split

• Physics 35% | Chemistry 35% | Biology 30%
• Aim: 30 numericals (mixed), 30 concept MCQs, 10 labeling/diagrams

Last-48h checklist

• Re-do 10 numericals (motion/gravitation/WEP)
• Balance 10 easy equations; quick mole conversions
• Label neat diagrams: cell, neuron, xylem/phloem

Quick facts/formulas

• v=u+atv=u+atv=u+at, s=ut+12at2s=ut+\frac{1}{2}at^2s=ut+21​at2, v2=u2+2asv^2=u^2+2asv2=u2+2as
• F=maF=maF=ma; g≈9.8 m/s2g \approx 9.8\,m/s^2g≈9.8m/s2
• Work W=Fscos⁡θW=Fs\cos\thetaW=Fscosθ; Power P=WtP=\frac{W}{t}P=tW​
• 1 mole =6.022×1023=6.022\times10^{23} =6.022×1023 particles; n=mMn=\frac{m}{M}n=Mm​

Speed tactics

• Write “Given/To find/Formula/Calculation/Unit” for every numerical
• In theory answers, start with definition → key point → example
• For diagram Qs: big, labeled, ruler-clean; no shading

Exam-day mini-plan

• Attempt Physics numericals when fresh; park long theory for mid-block
• Leave 10 min for equation balancing & diagram labels