CBSE Class 10 Science Weightage 2026 Unit and Chapter-Wise Marks Distribution

CBSE Class 10 Science Weightage 2026 : The CBSE 10th Science board exam is conducted for 100 marks, out of which 80 marks are allocated to the theory paper and 20 marks are for the internal assessment. The science theory paper is divided into five sections. Section A consists of 20 objective-type questions, and each carries 1 mark, for a total of 20 marks. Section B consists of 6 short-answer type questions, each carrying 2 marks and the total marks allotted are 12. Section C consists of 7 short-answer questions, each carrying 3 marks, for a total of 21 marks. Section D consists of 3 long-answer questions, each worth 5 marks, for a total of 15 marks and Section E contains 3 Case Study-Based questions, each carrying 4 marks, totaling 12 marks. You can also check CBSE Class 10 Science Syllabus 2025-26 to check the topic-wise weightage. For more information, you can go through the article below as well.

CBSE Class 10 Science Unit-wise Weightage 2026

You can check the unit-wise CBSE Class 10 Science marks distribution scheme here.

Units	Weightage %	Marks Allotted
Chemical Substances - Nature and Behaviour	31.25%	25
World of Living	31.25%	25
Natural Phenomena	15%	12
Effects of Current	16.25%	13
Natural Resources	6.25%	5

CBSE Class 10 Science Internal Assessment Weightage 2026

The 20 marks internal assessment is divided into the following components:

• Periodic Assessment - 05 marks + 05 marks
• Subject Enrichment (Practical Work) - 05 marks
• Portfolio - 05 marks

Also Check CBSE Class 10 Science Sample Papers 2025-26

CBSE Class 10 Science Question Paper Blueprint 2026

The question paper weightage has been provided here; this will help you to get an idea about the number of the types of the questions that will be asked in the final paper.

• Typology of Questions: VSA including objective-type questions, Assertion–Reasoning-type questions, SA, LA, and Source-based/Case-based/Passage-based/Integrated assessment questions.
• An internal choice of approximately 33% would be provided.

Competencies	Total
Demonstrate Knowledge and Understanding	50%
Application of Knowledge/Concepts	30%
Formulate, Analyze, Evaluate and Create	20%

To gain an understanding of the weightage, you can also check the CBSE Class 10 Science Exam Pattern 2026 .