CBSE Class 10 Science Syllabus 2025-26: Detailed Breakdown and Study Guide

Introduction

Class 10 is an important stage in a student’s academic journey, and Science is one of the core subjects in the CBSE curriculum. Understanding the CBSE Class 10 Science syllabus for 2025-26 is essential for effective exam preparation. This article provides a detailed breakdown of the syllabus, including unit-wise topics, marking schemes, practicals, and internal assessments. It also includes useful study tips to help students achieve their academic goals.

CBSE Class 10 Science Syllabus 2025-26: Overview

The CBSE Class 10 Science syllabus is divided into three major sections:

Physics – Covers concepts related to electricity, light, and motion.
Chemistry – Focuses on chemical reactions, acids and bases, metals and non-metals.
Biology – Includes life processes, control and coordination, and heredity.

The final board exam consists of a theory paper (80 marks) and an internal assessment (20 marks).

CBSE Class 10 Science Theory Syllabus 2025-26 (80 Marks)

Below is a unit-wise breakdown of the syllabus along with weightage:

Physics Syllabus

Physics in Class 10 focuses on practical applications of scientific concepts. The main topics include:

Light – Reflection and Refraction

Laws of reflection and refraction
Image formation by mirrors and lenses
Power of lens

The Human Eye and the Colourful World

Defects of vision and their correction
Dispersion of light

Electricity

Ohm’s law, Resistance, Series and Parallel Circuits
Heating effect of electric current

Magnetic Effects of Electric Current

Magnetic field and field lines
Electromagnetic induction

Sources of Energy

Conventional and non-conventional sources
Environmental impact

Physics Weightage: 25-30 marks

Chemistry Syllabus

Chemistry helps students understand the composition and properties of matter. The topics include:

Chemical Reactions and Equations

Types of chemical reactions
Balancing chemical equations

Acids, Bases, and Salts

Properties and reactions of acids and bases
pH scale and its significance

Metals and Non-Metals

Physical and chemical properties
Reactivity series

Carbon and Its Compounds

Covalent bonding, hydrocarbons, and functional groups

Periodic Classification of Elements

Modern periodic table and trends

Chemistry Weightage: 25-30 marks

Biology Syllabus

Biology focuses on life processes and genetics. The major topics include:

Life Processes

Nutrition, respiration, transportation, and excretion

Control and Coordination

Nervous system and hormones in animals and plants

How Do Organisms Reproduce?

Asexual and sexual reproduction
Reproductive health

Heredity and Evolution

Mendel’s laws, sex determination

Our Environment and Sustainable Management of Resources

Ecosystem, food chain, conservation

Biology Weightage: 20-25 marks

Internal Assessment (20 Marks)

The internal assessment includes:

Periodic Tests (5 marks) – Short tests conducted by schools.
Notebook Submission (5 marks) – Maintaining a complete and updated notebook.
Practical Work (10 marks) – Laboratory experiments and activities.

CBSE Class 10 Science Practicals 2025-26

Students must perform experiments related to:

Physics: Mirror and lens experiments, Ohm’s law
Chemistry: pH testing, reactions of acids and bases
Biology: Identification of plant tissues, observation of stomata

Deleted Topics in CBSE Class 10 Science 2025-26

CBSE has removed some topics from the syllabus to make learning more effective. Students should check the latest CBSE notifications for updated details.

Best Books for CBSE Class 10 Science

The NCERT Science textbook is one of the most important books for the preparation of exams. Students should also refer to the NCERT Exemplar for additional questions and practice.

Tips to Secure Good Marks in CBSE Class 10 Science Exam

Understand Concepts: Focus on understanding rather than memorization.
Practice Diagrams: Draw and label important diagrams in Biology.
Solve NCERT Questions: Most board exam questions are from NCERT books.
Make Short Notes: Summarize formulas, reactions, and key points.
Revise Regularly: Keep revising the syllabus to retain information.

Conclusion

The CBSE Class 10 Science syllabus 2025-26 covers a wide range of important topics in Physics, Chemistry, and Biology. By following the syllabus and using NCERT books effectively, students can prepare well for the exam. Focus on concepts, practice regularly, and stay confident for a successful academic year!

ALSO READ: CBSE Syllabus 2025-26 Class 10 – Simple Guide for All Subjects

CBSE Class 10 Science Syllabus 2025-26: Detailed Breakdown and Study Guide