CBSE Class 10 Science focuses on building a clear understanding of concepts from Physics, Chemistry, and Biology. The Science syllabus includes topics like Chemical Reactions, Electricity, Life Processes, and Heredity, with an emphasis on diagrams and application-based questions. NCERT is the key resource for preparation.
CBSE Class 10 Science Syllabus 2026–27 has been officially released by the Central Board of Secondary Education for the new academic session. This updated syllabus gives students a clear overview of the course structure, including unit-wise topics and the latest marking scheme.
Science helps you connect theory with real-world applications across Physics, Chemistry, and Biology. The CBSE syllabus covers essential topics that strengthen your basics for higher studies.
With PW, you can cover the syllabus easily usingsample papers, important questions, and PYQs that support effective preparation. Knowing the chapters and their flow makes revision simpler and more focused. This overview breaks down the syllabus clearly so you can organise your study plan well and aim for better performance in your exams.
CBSE Class 10 Science Syllabus 2026–27: Chapter-wise List
Class 10 CBSE syllabus Science 2026–27 focuses on strengthening your conceptual understanding in Physics, Chemistry and Biology. The subject encourages you to apply scientific principles in real-life situations and develop logical reasoning, problem-solving skills, and practical knowledge.
Unit
Chapter No.
Chapter Name
Unit I: Chemical Substances – Nature and Behaviour
1
Chemical Reactions and Equations
2
Acids, Bases and Salts
3
Metals and Non-metals
4
Carbon and Its Compounds
Unit II: World of Living
5
Life Processes
6
Control and Coordination
7
How do Organisms Reproduce
8
Heredity and Evolution
Unit III: Natural Phenomena
9
Light – Reflection and Refraction
10
Human Eye and the Colourful World
Unit IV: Effects of Current
11
Electricity
12
Magnetic Effects of Electric Current
Unit V: Natural Resources
13
Sources of Energy
CBSE Class 10 Science Marks Distribution and Exam Pattern 2026–27
The Science exam includes both theory and practical components to test understanding and application.
Overall Marks Distribution
Component
Marks
Theory Exam
80
Internal Assessment
20
Total
100
Section-wise Question Pattern
Section
Question Type
Marks
Section A
MCQs
1 mark
Section B
Short Answer
2–3 marks
Section C
Long Answer
4–5 marks
Total
_
80
CBSE Class 10th Science 2026-27 Marks Distribution
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.
For the board exams, understanding this distribution helps students focus more on high-scoring units and avoid under-preparing important sections. Check below the CBSE Class 10th Science 2026-27 Marks Distribution:
CBSE Class 10th Science 2026-27 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
12
IV
Effects of Current
Ch 11, 12
13
V
Natural Resources & Sustainable Practices
Integrated topics
5
Total Theory Marks
80
Practical and Internal Assessment
20
CBSE Class 10 Science Practical and Internal Assessment (20 Marks)
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 Chapter-wise Weightage 2026–27
Understanding the chapter-wise weightage helps you focus on important topics and prepare effectively.
Chapter-wise weightage 2026-27
Chapter No.
Chapter Name
Marks (Approx.)
1
Chemical Reactions and Equations
4–6
2
Acids, Bases and Salts
6–8
3
Metals and Non-metals
6–8
4
Carbon and Its Compounds
6–8
5
Life Processes
6–8
6
Control and Coordination
3–5
7
How do Organisms Reproduce
4–6
8
Heredity and Evolution
4–6
9
Light – Reflection and Refraction
6–8
10
Human Eye and the Colourful World
3–5
11
Electricity
6–8
12
Magnetic Effects of Electric Current
6–8
13
Sources of Energy
3–5
Class 10 Science Preparation Tips 2026–27
Preparing for Class 10 Science becomes easier when you focus on concepts, diagrams, and regular revision.
Phase 1: Concept Building (First 2–3 Months)
Read NCERT thoroughly
Understand concepts and diagrams
Make short notes
Phase 2: Practice & Application (Next 1–2 Months)
Solve NCERT questions and PYQs
Practice numerical problems (Physics)
Focus on important reactions (Chemistry)
Phase 3: Revision & Testing (Last 1 Month)
Revise all chapters
Practice sample papers
Focus on weak areas
CBSE Class 10 Science Syllabus PDF Download 2026–27
The CBSE Class 10 Science Syllabus 2026–27 PDF has been officially released by the Central Board of Secondary Education. Referring to the latest syllabus is crucial for effective board exam preparation, as it helps students focus on prescribed chapters, understand unit-wise weightage, and prioritise important topics likely to appear in the final exam.
Where can I download the official CBSE Class 10 Science Syllabus 2026 PDF?
The official syllabus PDF is available on the Central Board of Secondary Education website. You can also download it from the link provided in this article for direct access.
Which units carry the highest weightage in the board exam?
Unit I (Chemical Substances) and Unit II (World of Living) carry the highest weightage of 25 marks each, making them crucial for focused preparation.
What is included in the Class 10 CBSE Science syllabus 2026?
It includes Physics, Chemistry, and Biology chapters along with practical-based learning to build strong conceptual understanding.
Which chapters are most important in Class 10 Science?
Electricity, Carbon and Its Compounds, Life Processes, Light, and Chemical Reactions are high-weightage and frequently asked in exams.
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