CBSE Class 10 Science Syllabus 2018-2019 (Download PDF)


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CBSE Class 10 Science syllabus is compiled in accordance w/guidelines laid down by board. As per assessment scheme introduced in Class 10 from last session, 2017 - 18, now class 10 students are assessed on basis of final exam in all scholastic subjects carrying 100 marks.

It is composed of 80 marks component for board examination & 20 marks component for Internal Assessment (IA).

IA comprises Periodic Tests (PT) w/weightage of 10 marks, Notebook Submission of 5 marks & Subject Enrichment Activities of 5 marks.

General Instructions

  • Out of 80 marks annual examination, 68 marks weightage is for theory & 12 marks weightage is for practical based questions.

  • For internal assessment

  • 3 periodic tests are conducted by school. Average of best 2 tests is calculated w/having weightage of 10 marks towards final result.

  • Practical/Laboratory work should be done throughout year as it carries weightage of 5 marks towards final result.

  • Class work & home assignment completion along w/neatness & upkeep of notebook carries weightage of 5 marks towards final result.

CBSE Class 10 Science Unit-Wise Weightage

Table of the CBSE Class 10 Science Unit-Wise Weightage

Table of the CBSE Class 10 Science Unit-Wise Weightage

Unit No.

Unit Name



Chemical Substances - Nature & Behaviour



World of Living



Natural Phenomena



Effects of Current



Natural Resources




Internal assessment


Grand Total


Theme: Materials

Unit I: Chemical Substances-Nature and Behaviour

(55 Periods)

Chemical reactions:

  • Chemical equation,

  • Balanced chemical equation,

  • Implication of balanced chemical equation,

  • Types of chemical reactions:

  • Combination,

  • Decomposition,

  • Displacement,

  • Double displacement,

  • Precipitation,

  • Neutralization,

  • Oxidation and

  • Reduction.

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

Metals and nonmetals: Properties of metals & non-metals; Reactivity series; Formation & properties of ionic compounds; Basic metallurgical processes; Corrosion & 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 & alkynes), difference b/w saturated hydrocarbons & unsaturated hydrocarbons. Chemical properties of carbon compunds (combustion, oxidation, addition & substitution reaction). Ethanol & Ethanoic acid (only properties & uses), soaps & detergents.

Periodic classification of elements: Need for classification, Early attempts at classification of elements (Dobereiner’s Triads, Newland’s Law of Octaves, Mendeleev’s Periodic Table), Modern periodic table, gradation in properties, valency, atomic number, metallic & non-metallic properties.

Theme: The World of the Living

Unit II: World of Living

(50 Periods)

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

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

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

Heredity and Evolution: Heredity; Mendel’s contribution - Laws for inheritance of traits: Sex determination: brief introduction; Basic concepts of evolution. s

Theme: Natural Phenomena

Unit III: Natural Phenomena

(23 Periods)

  • Reflection of light by curved surfaces; Images formed by spherical mirrors, centre of curvature, principal axis, principal focus, focal length, mirror formula (Derivation not required), magnification.

  • Refraction, Laws of refraction, refractive index.

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

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

  • Refraction of light thru prism, dispersion of light, scattering of light, applications in daily life.

Theme: How Things Work

Unit IV: Effects of Current

(32 Periods)

Electric current, potential difference & electric current. Ohm’s law; Resistance, resistivity, Factors on which resistance of conductor depends. Series combination of resistors, parallel combination of resistors & its applications in daily life. Heating effect of electric current & its applications in daily life. Electric power, Interrelation b/w P, V, I & R.

Magnetic effects of current: Magnetic field, field lines, field due to current carrying conductor, field due to current carrying coil or solenoid; Force on current carrying conductor, Fleming’s Left Hand Rule, Electric Motor, Electromagnetic induction. Induced potential difference, Induced current. Fleming’s Right Hand Rule, Electric Generator, Direct Current. Alternating current: frequency of AC. Advantage of AC over DC. Domestic electric circuits.

Theme: Natural Resources

Unit V: Natural Resources

(20 Periods)

Sources of energy: Diff. forms of energy, conventional & non-conventional sources of energy: Fossil fuels, solar energy; biogas; wind, water & tidal energy; Nuclear energy. Renewable v/s non-renewable sources of Energy.

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

Management of natural resources: Conservation & judicious use of natural resources. Forest & wild life; Coal & Petroleum conservation. Examples of people’s participation for conservation of natural resources. Big dams: advantages & limitations; alternatives, if any. Water harvesting. Sustainability of natural resources.


Praticals should be conducted alongside concepts taught in theory classes.

List of Experiments:

  • Finding pH of following samples by using pH paper/universal indicator:

    • Dilute Hydrochloric Acid

    • Dilute NaOH solution

    • Dilute Ethanoic Acid Solution

    • Lemon juice

    • Water

    • Dilute Hydrogen Carbonate solution

    • Studying properties of acids & bases (HCl & NaOH) by their reaction with:

    • Litmus solution (Blue/Red)

    • Zinc metal

    • Solid sodium carbonate

  • Performing & observing following reactions & classifying them into:

    • Combination reaction

    • Decomposition reaction

    • Displacement reaction

    • Double displacement reaction

    • Action of water on quick lime

    • Action of heat on ferrous sulphate crystals

    • Iron nails kept in copper sulphate solution

    • Reaction b/w sodium sulphate & barium chloride solutions


  • Observing action of Zn, Fe, Cu & Al metals on following salt solutions:

  • ZnSO4 (aq)

  • FeSO4 (aq)

  • CuSO4 (aq)

  • Al2 (SO4) 3 (aq)

Arranging Zn, Fe, Cu & Al (metals) in decreasing order of reactivity based on above result.

  • Studying dependence of potential difference (V) across resistor on current (I) passing thru it & determine its resistance. Plotting graph b/w V & I.

  • Determination of equivalent resistance of 2 resistors when connected in series & parallel.

  • Preparing temporary mount of leaf peel to show stomata.

  • Experimentally show that carbon dioxide is given out during respiration.

  • Study of following properties of acetic acid (ethanoic acid):

  • Odour

  • Solubility in water

  • Effect on litmus

  • Reaction w/sodium Hydrogen Carbonate

  • Study of comparative cleaning capacity of sample of soap in soft & hard water.

  • Determination of focal length of Concave mirror & Convex lens by obtaining image of distant object.

  • Tracing path of ray of light passing thru rectangular glass slab for diff. angles of incidence. Measure angle of incidence, angle of refraction, angle of emergence & interpret result.

  • Studying (a) binary fission in Amoeba & (b) budding in yeast w/help of prepared slides.

  • Tracing path of rays of light thru glass prism.

  • Finding image distance for varying object distances in case of convex lens & drawing corresponding ray diagrams to show nature of image formed.

  • Identification of diff. parts of embryo of dicot seed (Pea, gram or red kidney bean).

- Published/Last Modified on: January 21, 2019

CBSE Board Upd.