CBSE 2025 Class 10 Science Chapter Wise Weightage

CBSE 2025 Class 10 Science Chapter Wise Weightage is discussed below along with the unit-wise and topic-wise breakdown of the marks.

Abhilasha Kiran

Updated on -Feb 6, 2025 | 08:06 PM IST

CBSE 2025 Class 10 Science Chapter Wise Weightage is given below (Image Credits: pexels.com).

CBSE 2025 Class 10 Science Chapter Wise Weightage: The Central Board of Secondary Education (CBSE) has released the chapter-wise weightage for the Class 10 Science exam for the academic year 2024-2025. The CBSE 2025 Class 10 Science Chapter Wise Weightage is made available on the official website of the board - cbseacademic.nic.in. Based on the official breakdown, here are the valuable insights into the marks distribution weightage of each chapter. This CBSE 2025 Class 10 Science Chapter Wise Weightage can aid students in prioritizing their studies. By understanding the weightage assigned to different units and topics, students can allocate their time effectively and focus on areas that carry more marks. The details also include the marks allocated to various internal assessments.

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CBSE 2025 Class 10 Science Chapter Wise Weightage | Overall

The CBSE Class 10 Science exam will include practical and theory exams for a total of 100 marks. Out of this, 80 marks are dedicated to the theory exam and 20 marks are dedicated to the internal assessment exams. The theory paper will include questions from 5 chapters - Chemical Substances-Nature and Behaviour, World of Living, Natural Phenomena, Effects of Current, and Natural Resources. Candidates can check the detailed CBSE 2025 Class 10 Science Chapter Wise Weightage below.

UNIT - 1 | Chemical Substances-Nature and Behaviour

Chapters	Marks
Chemical Reactions and Equations	8
Acid, Bases and Salts	5
Metals and Non-Metals	7
Carbon and its Compounds	5
Total	25

UNIT -2 | World of Living

Chapters	Marks
Life Processes	8
Control and Coordination	4
How do Organisms Reproduce?	5
Heredity and Evolution	8
Total	25

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UNIT - 3 | Natural Phenomena

Chapters	Marks
Light- Reflection and Refraction	8
The Human Eye and the Colourful World	2
Electricity	2
Total	12

UNIT -4 | Effects of Current

Chapters	Marks
Magnetic Effects of Electric Current	8
Sources of energy	5
Total	13

UNIT - 5 | Natural Resources

Chapters	Marks
Our Environment	5
Total	5

The theory exam of the CBSE 2025 Class 10 will be divided into 5 sections, namely section A, B, C,D and E. These will include a variety of question formats like MCQs, short answer questions, long answer questions, and source-based questions. Further, while all questions will be compulsory, candidates will be given internal choices of up to 33%.

CBSE 2025 Class 10 Science Weightage for Internal Assessment

The internal assessments carry 20 marks and here is how they are allocated.

Type of Assessment	Marks
Periodic Assessment	5
Multiple Assessment	5
Subject Enrichment (Practical Work)	5
Portfolio	5
Total	20

Students can effectively plan their study strategy for the Science exam with the help of CBSE 2025 Class 10 Science Chapter Wise Weightage.