CBSE Class 10 Science Syllabus 2023-24: Changes and Updates

SubjectScience (086)
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CBSE Class 10 Science Syllabus 2023-24

SCIENCE (Code No. 086)

CLASS – X (2023-24)

  • Theory – 80 Marks
  • Internal Assessment – 20 Marks


Unit No.UnitMarks
IChemical Substances- Nature and Behaviour25
IIWorld of Living25
IIINatural Phenomena12
IVEffects of Current13
VNatural Resources05

Theme: Materials

Unit I: Chemical Substances - Nature and Behaviour

Chemical reactions: Chemical equation, Balanced chemical equation, implications of a balanced chemical equation, types of chemical reactions: combination, decomposition, displacement, double displacement, precipitation, endothermic exothermic reactions, oxidation, and reduction.

Acids, bases, and salts: Their definitions in terms of furnishing of H+ and OH– ions, General properties, examples and uses, neutralization, the concept of pH scale (Definition relating to the logarithm not required), the importance of pH in everyday life; preparation and uses of Sodium Hydroxide, Bleaching powder, Baking soda, Washing soda, and Plaster of Paris.

Metals and nonmetals: Properties of metals and non-metals; Reactivity series; Formation and properties of ionic compounds; Basic metallurgical processes; Corrosion and its prevention.

Carbon compounds: Covalent bonding in carbon compounds. Versatile nature of carbon. Homologous series. Nomenclature of carbon compounds containing functional groups (halogens, alcohol, ketones, aldehydes, alkanes, and alkynes), the difference between saturated hydrocarbons and unsaturated hydrocarbons. Chemical properties of carbon compounds (combustion, oxidation, addition, and substitution reaction). Ethanol and Ethanoic acid (only properties and uses), soaps, and detergents.

Theme: The World of the Living

Unit II: World of Living

Life processes: ‘Living Being’. Basic concept of nutrition, respiration, transport, and excretion in plants and animals.

Control and coordination in animals and plants: Tropic movements in plants; Introduction of plant hormones; Control and coordination in animals: Nervous system; Voluntary, involuntary, and reflex action; Chemical co-ordination: animal hormones.

Reproduction: Reproduction in animals and plants (asexual and sexual) reproductive health - need and methods of family planning. Safe sex vs HIV/AIDS. Childbearing and women’s health.

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

Theme: Natural Phenomena

Unit III: Natural Phenomena

Reflection of light by curved surfaces; Images formed by spherical mirrors, the center of curvature, principal axis, principal focus, focal length, mirror formula (Derivation not required), magnification. Refraction; Laws of refraction, refractive index.

Refraction of light by the spherical lens; Image formed by spherical lenses; Lens formula(Derivation not required); Magnification. Power of a lens.

Functioning of a lens in a human eye, defects of vision and their corrections, and applications of spherical mirrors and lenses.

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).

Theme: How Things Work

Unit IV: Effects of Current

Electric current, potential difference, and electric current. Ohm’s law; Resistance, Resistivity, Factors on which the resistance of a conductor depends. The series combination of resistors, parallel combination of resistors, and its applications in daily life. Heating effect of electric current and its applications in daily life. Electric power, Interrelation between P, V, I, and R.

Magnetic effects of current: Magnetic field, field lines, field due to a current carrying conductor, field due to current carrying coil or solenoid; Force on a current carrying conductor, Fleming’s Left Hand Rule, Direct current. Alternating current: frequency of AC. Advantage of AC over DC. Domestic electric circuits.

Theme: Natural Resources

Unit V: Natural Resources

Our environment: Eco-system, Environmental problems, Ozone depletion, waste production, and their solutions. Biodegradable and non-biodegradable substances.

Download CBSE Class 10 Science Syllabus for 2023-24 [pdf]

List of DELETED Topics from NCERT Class 10 Science:

ChapterPage No.Dropped Topics/Chapter
Chapter 5: Periodic Classification of Elements79-92Full chapter
Chapter: 9 Heredity and Evolution (Chapter name replaced with: Heredity)147-158Box item: Charles Robert Darwin
Box item: Origin of life on earth
Box item: How do fossils form layer by layer
Box item: Molecular phylogeny
9.3 Evolution
9.3.1 An Illustration
9.3.2 Acquired and Inherited Traits
9.4 Speciation
9.5 Evolution and Classification
9.5.1 Tracing Evolutionary Relationships
9.5.2 Fossils
9.5.3 Evolution by Stages
9.6 Evolution Should Not Be Equated With ‘Progress’
9.6.1 Human Evolution
Chapter: 11 The Human Eye and the Colourful World188, 189, 196 and 197Two box items:
• Damage to or malfunction of any part
• Why of the visual system... do we have two eyes for vision and not just one?
11.6.3 Colour of the Sun at Sunrise and Sunset
Chapter: 12 Electricity201Box item: ‘Flow’ of charges inside a wire
Chapter: 13 Magnetic Effects of Electric Current232-237Box item: Michael Faraday
3.4 Electric Motor
3.5 Electromagnetic Induction
3.6 Electric Generator
Chapter: 14 Sources of Energy242-255Full chapter
Chapter: 16 Sustainable Management of Natural Resources266-288Full chapter
Also See:
CBSE Class 10 English Language & Literature Syllabus 2023-24
CBSE Class 10 Mathematics Syllabus 2023-24
CBSE Class 10 Social Science Syllabus 2023-24

MUST SEE: CBSE Class 10 Notes

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