CBSE Class 10th science syllabus 2025-26: CBSE has officially released the updated Science syllabus for Class 10 for the academic session 2025–26. Students preparing for the board examination must carefully review the complete syllabus, including units, mark distribution, practical components, and chapter-wise topics.
The class 10th science syllabus helps in planning a focused and efficient study strategy throughout the year. Here we provide a clear breakdown of the CBSE Class 10 Science Syllabus, along with a downloadable PDF link, unit-wise marks, important topics, and frequently asked questions.
CBSE Class 10th Science Syllabus 2025-26
The CBSE Class 10th Science Syllabus 2025–26 aims to strengthen a student’s conceptual understanding in Physics, Chemistry and Biology. The subject encourages students to apply scientific principles in real-life situations and develop logical reasoning, problem-solving skills, and practical knowledge.
Scope of Learning:
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Chemistry: Properties and reactions of substances that build the material world
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Biology: Functions and interdependence of living organisms
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Physics: Understanding natural phenomena involving light, electricity and magnetism
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Environmental Science Elements: Sustainable practices and conservation
The syllabus focuses on experimentation, observation and linkages between science and everyday applications.
CBSE Class 10 Science Deleted Syllabus 2025- 26
Some chapters and topics in Science have been removed as per the deleted syllabus of Class 10 CBSE 2025-26.
Students should study only the remaining portions to prepare effectively for the 2026 board exams.
| Science Deleted Syllabus Class 10 CBSE 2025-26 |
| Chapter Name |
Deleted Topics / Portions |
| Periodic Classification of Elements |
Full chapter removed. Topics excluded include: Need for classification, early attempts (Dobereiner’s Triads, Newland’s Law of Octaves, Mendeleev’s Periodic Table), Modern Periodic Table, gradation in properties, valency, atomic number, and metallic/non-metallic properties. |
| Heredity and Evolution |
Selected topics removed: Basic concepts of evolution, evolution and classification, and the idea that evolution should not be equated with progress. |
| The Human Eye and the Colourful World |
Excluded: Application of scattering to explain the colour change of the Sun at sunrise and sunset. |
| Magnetic Effects of Current |
Removed topics include: Electric motor, electromagnetic induction, induced potential difference, induced current, Fleming’s right-hand rule, and electric generator. |
| Sources of Energy |
Full chapter deleted. Topics excluded: Different forms of energy, conventional and non-conventional energy sources (fossil fuels, solar, biogas, wind, water, tidal, nuclear), renewable vs. non-renewable energy. |
| Management of Natural Resources |
This chapter will not be assessed in the board exam; only be assessed for internal assessment. Excluded topics: Conservation of resources, forests and wildlife, coal and petroleum conservation, people’s participation in resource management, advantages and limitations of big dams, water harvesting, and sustainable use of resources. |
Class 10 Science Syllabus Chapter-Wise (2025–26)
The Class 10 Science syllabus for 2025–26 includes 12 chapters covering key concepts from Physics, Chemistry, and Biology.
Each chapter focuses on developing strong fundamentals and real-life applications of science. Below is the complete chapter-wise syllabus that helps students organise their study plan effectively for both mid-term and board examinations:
| Class 10 Science Syllabus Chapter-Wise (2025–26) |
| Chapter No. |
Chapter Name |
| 1 |
Chemical Reactions and Equations |
| 2 |
Acids, Bases and Salts |
| 3 |
Metals and Non-Metals |
| 4 |
Carbon and Its Compounds |
| 5 |
Life Processes |
| 6 |
Control and Coordination |
| 7 |
How Do Organisms Reproduce? |
| 8 |
Heredity and Evolution |
| 9 |
Light – Reflection and Refraction |
| 10 |
The Human Eye and the Colourful World |
| 11 |
Electricity |
| 12 |
Magnetic Effects of Electric Current |
CBSE Class 10th Science 2025-26 Weightage
The CBSE Class 10 Science syllabus is divided into units based on Chemistry, Biology and Physics, with specific marks assigned to each area for the board exam.
Understanding the marks distribution helps students prioritise topics and plan their preparation effectively. Check below for the complete unit-wise weightage for 2025–26:
| CBSE Class 10 Science Syllabus – Unit & Marks Distribution |
| Unit |
Unit Title |
Chapters Included |
Marks |
| I |
Chemical Substances – Nature and Behaviour |
Ch 1, 2, 3, 4 |
25 |
| II |
World of Living |
Ch 5, 6, 7 |
25 |
| III |
Natural Phenomena |
Ch 9, 10 |
10 |
| IV |
Effects of Current |
Ch 11, 12 |
15 |
| V |
Natural Resources & Sustainable Practices |
Integrated topics |
5 |
| Total Theory Marks |
|
|
80 |
| Practical and Internal Assessment |
|
|
20 |
Grand Total: 100 Marks
Science syllabus class 10 CBSE 2025–26 clearly indicates that Chemistry and Biology chapters hold major weightage in the final exam.
CBSE Class 10 Science Syllabus 2025–26 (Unit-Wise Overview)
The CBSE Class 10 Science Syllabus 2025–26 is divided into five units with clear weightage.
It covers key concepts from Chemistry, Biology, Physics, and Environmental Science to build strong fundamentals for board exams.
Unit I: Chemical Substances – Nature and Behaviour (25 Marks)
Unit II: World of Living (25 Marks)
Unit III: Natural Phenomena (12 Marks)
Unit IV: Effects of Current (13 Marks)
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Electric current and Ohm’s law
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Heating effect of electric current
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Electric power
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Magnetic effects of electric current
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AC and DC, domestic electric circuits
Unit V: Natural Resources (5 Marks)
CBSE Class 10 Science Practical and Internal Assessment (20 Marks)
The CBSE Class 10 Science practical and internal assessment carries 20 marks, covering laboratory experiments, viva, assignments and portfolio work.
cbse Science Class 10 syllabus practical evaluates a student’s practical skills and understanding beyond theory. Below is the structure of the internal assessment system, along with the list of important practical activities prescribed for 2025–26:
| CBSE Class 10 Science Practical and Internal Assessment (20 Marks) |
| CBSE science class 10 syllabus practical |
Marks |
| Practical Experiments |
5 |
| Lab Record |
5 |
| Portfolio & Assignments |
5 |
| Viva/Subject Enrichment |
5 |
CBSE Class 10 Science Syllabus PDF Download 2025–26
NCERT syllabus for class 10 science PDF 2025–26 has been officially released on the Central Board’s website. Understanding the latest syllabus is crucial for effective planning of board exam preparation and focusing on key topics that carry more weightage.
Below, we have provided the direct link to download the official Science syllabus class 10 CBSE 2025–26 PDF so that students can easily access it anytime. This PDF includes the complete unit-wise structure, chapter-wise topics, and internal assessment guidelines as prescribed by CBSE for the current academic session.
10 Science Syllabus PDF Download 2025–26
CBSE Class 10 Syllabus 2025-26 All Subjects
