CBSE Class 10 Term 1 and 2 Science Syllabus 2021-22

You can see the current CBSE Class 10 Science Syllabus here for the current academic session 2021-22.

The Central Board of Secondary Education, CBSE has divided the current academic year into two terms. Terms 1 and 2 are respectively the 1st and 2nd terms. It was decided to conduct the exams in both terms using the 50% syllabus. After CBSE Term 1 Results 2021 are announced, preparations will begin for the second term exams. In order to have enough time for revision before CBSE Term 2 Exams, students should now familiarize themselves with the new course curriculum for term 2.

General Instructions by CBSE:

1. There will be 80 marks in the Theory Examinations (Term I+II) and 20 marks in the Internal Assessment (Term I+II).

2. Internal Assessment - Maximum Marks 10 for each Term:

A. There will be periodic assessments that would include: 

Over the course of the session, the school will conduct three periodic tests. For the sake of determining the most appropriate periodic Test that was conducted in the term, the average of the two periodic tests/marks should be taken into consideration.

Different assessment methods are based on the dynamics of the class and the curriculum. The following may be included - short tests, oral tests, quizzes, concept maps, projects, posters, presentations, inquiry-based scientific investigations, etc.

B. A practical/laboratory component of subject enrichment should be made available to students throughout the year, and the student should keep a record of such activities. Practical Assessment should be continuous. All practicals listed in the syllabus must be completed. 

C. Portfolio to be prepared by the student- This would include classwork and other samples of student work.

Course Structure for CBSE Class 10 Science Term I and II (2021-2022):





Chemical Substances Nature and Behaviour



World of Living



Natural Phenomena



Effect of Current



Natural Resources



Internal Assessment





Theme: Materials (55 Periods)

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, the concept of pH scale (Definition relating to 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

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 and non-metallic properties.

Theme: The World of the Living (50 Periods)
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 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; Basic concepts of evolution.


Theme: Natural Phenomena (23 Periods) 

Unit III: Natural Phenomena

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.

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, applications of spherical mirrors and lenses.
Refraction of light through a prism, dispersion of light, scattering of light, applications in daily life.


Theme: How Things Work (32 Periods) 

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 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 (20 Periods) 

Unit V: Natural Resources

Sources of energy: Different forms of energy, conventional and non-conventional sources of energy: Fossil fuels, solar energy; biogas; wind, water, and tidal energy; Nuclear energy. Renewable versus non-renewable sources of Energy.

Our environment: Eco-system, Environmental problems, Ozone depletion, waste production, and their solutions. Biodegradable and non-biodegradable substances.
Management of natural resources: Conservation and judicious use of natural resources. Forest and wildlife; Coal and Petroleum conservation. Examples of people’s participation in the conservation of natural resources. Big dams: advantages and limitations; alternatives, if any. Water harvesting. Sustainability of natural resources.



Practical should be conducted alongside the concepts taught in theory classes



A.   Finding the pH of the 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

B.   Studying the properties of acids and bases (HCl & NaOH) on the basis of their reaction with:

  • Litmus solution (Blue/Red)
  • Zinc metal
  • Solid sodium carbonate


2.   Performing and observing the following reactions and classifying them into:

  • Combination reaction
  • Decomposition reaction
  • Displacement reaction
  • Double displacement reaction

(i)       Action of water on quicklime

(ii)       Action of heat on ferrous sulphate crystals

(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:

  • ZnSO4(aq)
  • FeSO4(aq)
  • CuSO4(aq)
  • 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 determining its resistance. Also plotting a graph between V and I.


5.    Determination of the equivalent resistance of two resistors when connected in series and parallel.

6. Preparing a temporary mount of a leaf peel to show stomata.

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

  8. Study of the following properties of acetic acid (ethanoic acid):

  • odour
  • solubility in water
  • effect on litmus
  • reaction with Sodium Hydrogen Carbonate

Study of the comparative cleaning capacity of a sample of soap in soft and hard water.

10. Determination of the focal length of:
  1. Concave mirror
  2. 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.

12. Studying (a) binary fission in Amoeba, and (b) budding in yeast and Hydra with the help of prepared slides.

13. Tracing the path of the rays of light through a glass prism.

14. Finding the image distance for varying object distances in the case of a convex lens and drawing corresponding ray diagrams to show the nature of the image formed.

15. Identification of the different parts of an embryo of a dicot seed (Pea, gram, or red kidney bean).

Best Of Luck For the Board Exams.

Post a Comment