CBSE Class 8 · Science

CBSE Class 8 Science Exam Preparation

Crop production, cell biology, coal, friction and light — one complete guide

Complete chapter-wise preparation guide for CBSE Class 8 Science. Covers agriculture, microorganisms, conservation, combustion, cells, sound, friction, and chemical effects of current.

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80

Theory Marks

20

Practical Marks

3 hours

Exam Duration

15

Total Chapters

Chapter-Wise Marks Breakdown

95 theory marks
ChapterMarksDifficulty
Crop Production and Management7Easy
Microorganisms: Friend and Foe7Easy
Synthetic Fibres and Plastics5Easy
Materials: Metals and Non-metals7Medium
Coal and Petroleum5Easy
Combustion and Flame6Medium
Conservation of Plants and Animals6Easy
Cell — Structure and Functions8Medium
Reproduction in Animals7Medium
Reaching the Age of Adolescence6Easy
Force and Pressure6Medium
Friction6Medium
Sound6Easy
Chemical Effects of Electric Current6Medium
Light7Medium

Topics That Appear Every Year

01Cell — plant vs animal cell comparison table
02Microorganisms — useful and harmful with examples
03Combustion — conditions and fire extinguisher types
04Metals vs non-metals — property comparison
05Friction — types and factors with examples
06Electrolysis and electroplating — process and uses
07Reproduction in animals — sexual vs asexual
08Crop production — Kharif vs Rabi crops

Study Strategy for 90+

1

Cell chapter is most important — draw plant and animal cells with all organelles

2

Make comparison tables: metal vs non-metal, plant vs animal cell, kharif vs rabi

3

Combustion: learn the fire triangle (fuel, heat, oxygen) and all 3 types

4

Physics chapters (Force, Friction, Sound, Light) need clear definitions with examples

5

Electroplating diagram is asked every year — practise drawing it

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