CBSE Class 10 · Science

CBSE Class 10 Science Board Exam Preparation

Physics, Chemistry and Biology — one complete board strategy

Complete chapter-wise preparation guide for CBSE Class 10 Science board exam. Unit-wise marks, important diagrams, key reactions, and study strategy for all three sections.

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80

Theory Marks

20

Practical Marks

3 hours

Exam Duration

13

Total Chapters

Chapter-Wise Marks Breakdown

82 theory marks
ChapterMarksDifficulty
Chemical Reactions & Equations6Easy
Acids, Bases & Salts6Easy
Metals & Non-metals6Medium
Carbon & Its Compounds6Medium
Life Processes10Hard
Control & Coordination7Medium
Reproduction8Medium
Heredity & Evolution5Medium
Light — Reflection & Refraction7Easy
Human Eye & Colourful World5Easy
Electricity7Medium
Magnetic Effects of Current5Easy
Our Environment & Management4Easy

Topics That Appear Every Year

01Life Processes diagrams — Human heart, nephron, digestive system, respiratory system
02Reflex arc diagram — every year
03Human reproductive system — male and female
04Mirror formula and lens formula with ray diagrams
05Electricity — series/parallel circuit numericals
06Balancing chemical equations — all types
07Reactivity series — order and reactions
08Mendel's cross — monohybrid and dihybrid

Study Strategy for 90+

1

Split Science into 3 parts: Physics (Light, Electricity, Magnetic Effects), Chemistry (Chapters 1–4), Biology (Chapters 5–8). Each section needs a different study approach

2

Biology = diagrams. Every important process has a diagram. Draw and label from memory daily. Diagrams carry 30–40% of Biology marks

3

Chemistry = reactions and equations. Balance every equation you study. CBSE gives 1 mark per correctly balanced equation

4

Physics = numericals + ray diagrams. Practice mirror and lens problems with all 3 cases: real/virtual, magnified/diminished

5

Mock papers reveal which section is weakest. Upload for AI evaluation to catch diagram labelling mistakes before the exam

Related Study Tips

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ClearSteps gives you CBSE Class 10 Science mock papers, concept videos for every chapter, and AI evaluation against the real CBSE marking scheme.

CBSE Class 10 · Improvement Exam · May 2026

Appearing for the May Improvement Exam? Practice with AI-ranked questions.

Built for the May 2026 Improvement Exam — board paper analysis + unlimited practice for Maths, Science, English & SST.

Improvement · May 2026

Mathematics

999
1599
Access to all CBSE Class 10 Maths chapters
Know which questions are most likely to come in your exam
Study by Chapter or by Section (A–E)
Step-by-step solutions for every question
AI-revealed high probability questions
Pattern recognition across past CBSE papers
Expected Paper for Improvement Exam (unlocks 3 weeks before)
Improvement · May 2026

Science

999
1599
Access to all CBSE Class 10 Science chapters
Know which questions are most likely to come in your exam
Study by Chapter or by Section (A–E)
Step-by-step solutions for every question
AI-revealed high probability questions
Pattern recognition across past CBSE papers
Expected Paper for Improvement Exam (unlocks 3 weeks before)
★ Best Value · May 2026

Four Subjects

Maths · Science · English · SST

2499
6396
All 4 subjects — Maths, Science, English & SST
Know which questions are most likely to come in your exam
Study by Chapter or by Section (A–E)
Step-by-step solutions for every question
AI-revealed high probability questions
Pattern recognition across past CBSE papers
Expected Paper for Improvement Exam (unlocks 3 weeks before)
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Improvement Exam · May 2026

CBSE Class 10 — Board Pattern