The Central Board of Secondary Education (CBSE) has officially released the CBSE Class 10 Science Syllabus for the academic year 2025-26. Students appearing for the Class 10 board exams can now download the detailed syllabus PDF from the CBSE academic website.
Latest:
This updated syllabus includes five major units: Chemical Substances, The World of Living, Natural Phenomena, Effects of Current, and Natural Resources. Understanding the syllabus thoroughly is essential for effective preparation for the CBSE 10th Science Board Exam 2025-26, which carries a total of 100 marks — 80 for theory and 20 for internal assessment.
CBSE 10th Science syllabus PDF: Download from cbseacademic.nic.in
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CBSE Class 10 Science Syllabus 2025-26 – Unit-Wise Topics
Here’s a detailed unit-wise breakdown of the CBSE 10th Science syllabus to help students plan their studies effectively:
Unit I: Chemical Substances – Nature and Behaviour (25 Marks)
- Chemical Reactions & Equations: Types of reactions (combination, decomposition, displacement, etc.), balanced chemical equations, oxidation and reduction.
- Acids, Bases & Salts: Properties, pH scale, real-life applications, and uses of common compounds like Sodium Hydroxide, Bleaching Powder, Baking Soda.
- Metals & Non-Metals: Physical and chemical properties, reactivity series, corrosion and prevention.
- Carbon & Its Compounds: Covalent bonding, hydrocarbons, functional groups, properties of ethanol and ethanoic acid, soaps and detergents.
Unit II: World of Living (25 Marks)
- Life Processes: Nutrition, respiration, transport, and excretion in plants and animals.
- Control & Coordination: Nervous system, reflex actions, hormones in animals and plants.
- Reproduction: Asexual and sexual reproduction, reproductive health, family planning, and awareness of HIV/AIDS.
- Heredity & Evolution: Mendel’s laws, inheritance of traits, sex determination.
Unit III: Natural Phenomena (12 Marks)
- Reflection & Refraction: Image formation by mirrors and lenses, magnification, and lens formula.
- Human Eye & Defects of Vision: Structure and functioning, corrective measures.
- Light Through a Prism: Dispersion, scattering, and real-life applications.
Unit IV: Effects of Current (13 Marks)
- Electricity: Ohm’s law, resistance, factors affecting resistance, series and parallel circuits, heating effect of current.
- Magnetic Effects: Magnetic field, field lines, Fleming’s Left Hand Rule, AC vs DC, domestic circuits.
Unit V: Natural Resources (5 Marks)
- Our Environment: Ecosystems, environmental issues, ozone depletion, biodegradable vs non-biodegradable waste.
CBSE 10th Science Marks Distribution 2025-26
| Unit | Marks |
| I. Chemical Substances | 25 |
| II. World of Living | 25 |
| III. Natural Phenomena | 12 |
| IV. Effects of Current | 13 |
| V. Natural Resources | 5 |
| Total (Theory) | 80 |
| Internal Assessment | 20 |
| Grand Total | 100 |
How to Download CBSE Class 10 Science Syllabus 2025-26 PDF?
Follow these steps to download the official Class 10 Science syllabus:
- Visit the official CBSE website at cbse.gov.in
- Click on “Academic Website”
- Select “Curriculum” from the main menu
- Choose “Curriculum 2025-26”
- Click on “Secondary Curriculum”
- Select “Academic Subjects”
- Click on “Science” to download the syllabus PDF
Frequently Asked Questions (FAQs)
Where can I get the CBSE Class 10 Science Syllabus 2025-26?
You can download it from the CBSE academic portal or follow the step-by-step guide above in this article.
What are the main units in the CBSE Class 10 Science syllabus?
Chemical Substances – Nature and Behaviour
The World of Living
Natural Phenomena
Effects of Current
Natural Resources
What is the marks distribution for the CBSE 10th Science Exam?
80 marks for theory
20 marks for internal assessment
Total: 100 marks