CBSE Class 10 Science Syllabus 2025-26 PDF Download (Latest Curriculum)

CBSE Class 10 Science Syllabus 2025-26

CBSE Class 10 Science Syllabus 2025-26: The Central Board of Secondary Education (CBSE) has officially published the revised Science syllabus for the 2025-26 academic session on its portal, www.cbseacademic.nic.in. With this curriculum now available, students should familiarize themselves with the course structure to streamline their board exam preparations. Please note that the CBSE conducts a single annual board examination, and no term-wise assessments are applicable. The Class 10 Science curriculum is categorized into 5 core units, detailed below for student guidance.

CBSE 10th Science Syllabus 2025-26

Science is a fundamental subject in the CBSE Class 10 curriculum, encompassing Physics, Chemistry, and Biology. Reviewing the 2025-26 syllabus is essential for effective exam planning. The course covers key themes, including Chemical Substances, World of the Living, Natural Phenomena, Effects of Current, and Natural Resources. Designed to foster scientific literacy, this syllabus encourages critical thinking, creativity, and analytical skills. By mastering the core concepts outlined in this document, students can build a strong foundation for both their board examinations and future academic pursuits.

CBSE Class 10 Science Syllabus 2025-26

The official subject-wise curriculum for the 2025-26 academic year is now live at www.cbseacademic.nic.in. The Science syllabus is structured into five distinct units, each with a defined mark distribution. A comprehensive breakdown of these units and their respective weightage is provided below to help students prioritize high-yield topics. Adhering to this official roadmap allows learners to focus their efforts on essential concepts, ensuring better preparation and performance in their final Science assessments.

CBSE Class 10 Science Syllabus 2025-26
Units	Units	Marks
I	Chemical Substances-Nature and Behaviour	25
II	World of the Living	25
III	Natural Phenomena	12
IV	Effects of Current	13
V	Natural Resources	05
Total		80
Internal Assessment		20
Grand Total		100

CBSE 10th Science Syllabus 2025-26

According to the latest PDF notification from the board, every unit consists of multiple chapters with specific weightage assigned for the final board examinations. Understanding the mark distribution for each chapter is crucial for strategic study. Please review the chapter-wise breakdown of the CBSE Class 10 Science Syllabus 2025-26 as listed below:

Unit I: Chemical Substances - Nature and Behaviour

Chapter- 1 Chemical Reactions

1. Chemical equation
2. Balanced chemical equation, Implications of a balanced chemical equation
3. Types of chemical reactions- Combination, decomposition, displacement, double displacement, precipitation, endothermic exothermic reactions, oxidation, and reduction

Chapter 2 Acids, bases, and salts

1. Their definitions in terms of furnishing of H+ and OH– ions,
2. General properties, examples and uses, neutralization, the concept of pH scale (Definition relating to logarithm not required),
3. Importance of pH in everyday life
4. Preparation and uses of Sodium Hydroxide, Bleaching powder, Baking soda, Washing soda and Plaster of Paris

Chapter-3 Metals & Non-metals

1. Properties of metals and non-metals
2. Reactivity series
3. Formation and properties of ionic compounds
4. Basic metallurgical processes
5. Corrosion and its prevention.

Chapter-4 Carbon compounds

1. Covalent bonding in carbon compounds
2. Versatile nature of carbon
3. Homologous series
4. Nomenclature of carbon compounds containing functional groups (halogens, alcohol, ketones, aldehydes, alkanes and alkynes)
5. Difference between saturated hydro carbons and unsaturated hydrocarbons.
6. Chemical properties of carbon compounds (combustion, oxidation, addition and substitution reaction).
7. Ethanol and Ethanoic acid (only properties and uses)
8. Soaps and detergents.

Unit II: World of Living

Chapter-5 Life Processes

World of Living: Explores the fundamental life processes, including nutrition, respiration, transportation, and excretion in both plants and animals.

Chapter-6 Control and co-ordination in animals and plants

1. Tropic movements in plants
2. Introduction of plant hormones
3. Control and co-ordination in animals: Nervous system
4. Voluntary, involuntary and reflex action
5. Chemical co-ordination: animal hormones

Chapter-7 Reproduction

1. Reproduction in animals and plants (asexual and sexual) reproductive health-need and methods of family planning.
2. Safe sex vs HIV/AIDS
3. Childbearing
4. Women’s health

Chapter-8 Heredity and Evolution

1. Heredity; Mendel’s contribution-  Laws for inheritance of traits
2. Sex determination: brief introduction; (topics excluded - evolution; evolution and classification and evolution should not be equated with progress).

Unit III: Natural Phenomena

Chapter-9 Reflection & Refraction

1. Reflection of light by curved surfaces; Images formed by spherical mirrors, center of curvature, principal axis, principal focus, focal length, mirror formula (Derivation not required), magnification. Refraction; Laws of refraction, refractive index.
2. Refraction of light by spherical lens; Image formed by spherical lenses; Lens formula(Derivation not required); Magnification. Power of a lens.
3. Functioning of a lens in the human eye, defects of vision and their corrections, and applications of spherical mirrors and lenses.
4. Refraction of light through a prism, dispersion of light, scattering of light, and applications in daily life (excluding the color of the sun at sunrise and sunset).

Unit IV: Effects of Current

Chapter-10 Electricity Ohm’s law; 

1. Electric current, potential difference, and electric current.
2. Ohm’s law
3. Resistance, Resistivity, and Factors on which the resistance of a conductor depends.
4. Series combination of resistors, parallel combination of resistors, and its applications in daily life.
5. Heating effect of electric current and its applications in daily life.
6. Electric power
7. Interrelation between P, V, I, and R.

Chapter-11 Magnetic effects of current 

1. Magnetic field, field lines, field due to a current-carrying conductor, field due to current carrying coil or solenoid
2. Force on a current-carrying conductor
3. Fleming’s Left Hand Rule
4. Direct current
5. Alternating current: frequency of AC
6. Advantage of AC over DC
7. Domestic electric circuits.

Unit V: Natural Resources

Chapter-12 Our Environment 

1. Eco-system,
2. Environmental problems
3. Ozone depletion
4. Waste production and their solutions
5. Biodegradable and non-biodegradable substances

Check :- CBSE Class 10 Result 2025

CBSE Class 10th Science Syllabus 2025-26 PDF Download Link

All students preparing for the upcoming board examinations can download the full syllabus directly from the official CBSE website. You can also view the detailed CBSE Class 10th syllabus for all subjects via the link provided below. This document also includes essential details regarding exam patterns, internal assessments, project work, and practical components required throughout the academic year.

Download Official CBSE Class 10 Science Syllabus 2025-26 PDF

CBSE Class 10 Science Syllabus- General Instructions

1. The assessment structure consists of an 80-mark theory examination and a 20-mark internal assessment component.

2. Internal Assessment - Maximum 20 Marks.

3. Subject Enrichment: Practical and laboratory work must be conducted continuously throughout the year, with students maintaining a comprehensive record of all experiments listed in the syllabus.

4. Portfolio: Students are required to maintain a portfolio containing classwork and samples of academic assignments throughout the session.

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