📘 Class 10 Science Chapter-wise Weightage (2025)
Scoring well in Science isn't about studying everything equally—it's about knowing where to focus. The CBSE Science paper is divided into Physics, Chemistry, and Biology, and each unit carries a different weight in the board exam. Here's a complete chapter-wise weightage breakdown to help you prepare smartly for the 2025 exams.
🧪 Why Chapter-wise Weightage Matters
Knowing the marks distribution helps you allocate your study time wisely. For example, chapters like "Carbon and Its Compounds" and "Life Processes" usually carry more weight and deserve more revision time compared to chapters like "Management of Natural Resources."
📊 Science Chapter-wise Marks Distribution
| Unit / Chapter Name | Expected Marks |
|---|---|
| Unit I: Chemical Substances – Nature & Behaviour | 25 |
| 1. Chemical Reactions and Equations | 4–5 |
| 2. Acids, Bases and Salts | 4–5 |
| 3. Metals and Non-metals | 6–7 |
| 4. Carbon and Its Compounds | 8–9 |
| Unit II: World of Living | 23 |
| 5. Life Processes | 7–8 |
| 6. Control and Coordination | 3–4 |
| 7. How Do Organisms Reproduce? | 5–6 |
| 8. Heredity and Evolution | 4–5 |
| Unit III: Natural Phenomena | 12 |
| 9. Light – Reflection and Refraction | 6–7 |
| 10. Human Eye and Colourful World | 4–5 |
| Unit IV: Effects of Current | 13 |
| 11. Electricity | 6–7 |
| 12. Magnetic Effects of Electric Current | 5–6 |
| Unit V: Natural Resources | 7 |
| 13. Our Environment | 3–4 |
| 14. Management of Natural Resources | 3–4 |
📌 Final Strategy
Now that you know which chapters carry more marks, plan your revision smartly. Focus more on numerical and diagram-based chapters like "Electricity" and "Light." Practice writing answers for theory-based chapters like "Life Processes" and "Metals & Non-metals." If you're short on time, revise high-weightage chapters first.
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