CBSE Class 10 Science Syllabus 2024-25


CBSE Science Syllabus for Class 10 2024-25 sessions (Subject code 086)


CBSE Class 10 Science Syllabus – The subject of Science plays an important role in developing well-defined abilities in cognitive, affective and psychomotor domains in children.  It boosts the spirit of enquiry, creativity, objectivity and aesthetic sensibility. The present syllabus of Class 10 Science course has been designed around seven broad themes  –  Food; Materials; The World of The Living; How Things Work; Moving Things, People and Ideas; Natural Phenomenon and Natural Resources.


See: CBSE Class 10 English Syllabus 


The final examination (Board Exam) for CBSE Class 10 Science paper will be of 80 marks and 20 marks shall be for Internal Assessment. 

Let us have a look at the syllabus, unit wise weightage for CBSE Class 10 Science paper.


Assessment Areas 2024-25

Class X Science (086)


 Time: 3 hrs.                                                                                                                                Maximum Marks: 80 Marks




Demonstrate Knowledge and Understanding

46 %

Application of Knowledge/Concepts

22 %

Analyze, Evaluate and Create

32 %




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


Internal Assessment (20 Marks) 

a. Periodic Assessment – 05 marks + 05 marks
b. Subject Enrichment (Practical Work) – 05 marks
c. Portfolio – 05 marks

See: CBSE Class 10 Hindi syllabus (Code No. 085)



(Annual Examination)

Marks: 80

Unit No.




Chemical Substances-Nature and Behaviour



World of Living



Natural Phenomena



Effects of Current



Natural Resources




Internal assessment


Grand Total



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, neutralization, oxidation and reduction. 
  • Acids, bases and salts: Their definitions in terms of furnishing of H+ and OH ions, General properties, examples and uses, concept of pH scale (Definition relating to logarithm not required), 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), difference between saturated hydro carbons 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 co-ordination in animals and plants: Tropic movements in plants; Introduction of plant hormones; Control and co-ordination 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. Child bearing 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, 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 a lens. Functioning of a lens in human eye, defects of vision and their corrections, applications of spherical mirrors and lenses. 
  • Refraction of light through a prism, dispersion of light, scattering of light, applications in dailylife (excluding colour 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. 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 carryingconductor, field due to current carrying coil or solenoid; Force on 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. 




Note for the Teachers:

  1. The chapter Management of Natural Resources (NCERT Chapter 16) will not be assessed in the year-end examination. However, learners may be assigned to read this chapter and encouraged to prepare a brief write up to any concept of this chapter in their Portfolio. This may be for Internal Assessment and credit may be given Periodic Assessment/Portfolio).
  1. The NCERT text books present information in boxes across the book. These help students to get conceptual clarity. However, the information in these boxes would not be assessed in the year-end examination. 



Practical should be conducted alongside the concepts taught in theory classes


1.A. Finding the pH of the following samples by using pH paper/universal indicator: Unit-I
(i) Dilute Hydrochloric Acid
(ii) Dilute NaOH solution
(iii) Dilute Ethanoic Acid solution
(iv) Lemon juice
(v) Water
(vi) Dilute Hydrogen Carbonate solution
B. Studying the properties of acids and bases (HCl & NaOH) on the basis of their reaction with: Unit-I
a) Litmus solution (Blue/Red)
b) Zinc metal
c) Solid sodium carbonate
2. Performing and observing the following reactions and classifying them into: Unit-I
A.Combination reaction
B.Decomposition reaction
C.Displacement reaction
D. Double displacement reaction

(i) Action of water on quicklime
(ii) Action of heat on ferrous sulphate crystal
(iii) Iron nails kept in copper sulphate solution
(iv) Reaction between sodium sulphate and barium chloride solutions
3.Observing the action of Zn, Fe, Cu and Al metals on the following salt solutions: Unit-I
i) ZnSO4(aq)
ii) FeSO4(aq)
 iii) CuSO4(aq)
iv) Al2 (SO4)3(aq)
Arranging Zn, Fe, Cu and Al (metals) in the decreasing order of reactivity based on the above result
4. Studying the dependence of potential difference (V) across a resistor on the current (I) passing through it and determine its resistance. Also plotting a graph between V and I. Unit-IV
5.Determination of the equivalent resistance of two resistors when connected in series and parallel. Unit-IV
6.Preparing a temporary mount of a leaf peel to show stomata. Unit- II
7.Experimentally show that carbon dioxide is given out during respiration. Unit-II
8.Study of the following properties of acetic acid (ethanoic acid): Unit- I
i) Odour
ii) solubility in water
iii) effect on litmus
iv) reaction with Sodium Hydrogen Carbonate
9. Study of the comparative cleaning capacity of a sample of soap in soft and hard water. Unit- I
10. Determination of the focal length of: Unit-III
i) Concave mirror
ii) Convex lens
by obtaining the image of a distant object.
11. Tracing the path of a ray of light passing through a rectangular glass slab for different angles of incidence. Measure the angle of incidence, angle of refraction, angle of emergence and interpret the result. Unit – III
12. Studying (a) binary fission in Amoeba, and (b) budding in yeast and Hydra with the help of prepared slides. Unit-II
13. Tracing the path of the rays of light through a glass prism. Unit-III
14. Identification of the different parts of an embryo of a dicot seed (Pea, gram or red kidney bean)Unit-II 



  • Science-Text book for class X- NCERT Publication 
  • Assessment of Practical Skills in Science- Class X- CBSE Publication 
  • Laboratory Manual-Science-Class X NCERT Publication
  • Exemplar Problems Class X – NCERT Publication