# CBSE Class 10 Syllabus Science(Theory + Practical)

## CLASS X

 EVALUATION SCHEME THEORY Units Term – I Marks I Chemical Substances-Nature and Behaviour: Chapter 1,2 and 3 16 II World of Living: Chapter 6 10 III Natural Phenomena: Chapter 10 and 11 14 Units Term – II Marks I Chemical Substances-Nature and Behaviour: Chapter 4 and 5 10 II World of Living: Chapter 8 and 9 13 IV Effects of Current: Chapter 12 and 13 12 V Natural Resources: Chapter 15 05 Total Theory (Term I+II) 80 Internal Assessment: Term I 10 Internal Assessment: Term II 10 Grand Total 100

## Unit I: Chemical Substances – Nature and Behaviour

### Chapter -1 Chemical reactions and equations

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.

### Chapter – 2 Acids, Bases and Salts

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.

### Chapter – 3 Metals and non – metals

Metals and nonmetals: Properties of metals and non-metals; Reactivity series; Formation and properties of ionic compounds.

## Theme: The World of the Living Unit II: World of Living

### Chapter – 6 Life processes

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

## Unit III: Natural Phenomena

### Chapter – 10 Light – Reflection and Refraction

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.

### Chapter – 11 Human eye and colourful world

Refraction of light through a prism, dispersion of light, scattering of light, applications in daily life.

## Unit I: Chemical Substances – Nature and Behaviour

### Chapter – 4 Carbon and its compounds

Carbon compounds: Covalent bonding in carbon compounds. Versatile nature of carbon. Homologous series.

### Chapter – 5 Periodic classification of elements

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 Unit II: World of Living

### Chapter – 8 How do organisms reproduce?

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.

### Chapter – 9 Heredity and Evolution

Heredity: Heredity; Mendel’s contribution- Laws for inheritance of traits: Sex determination: brief introduction.

## Theme: Natural Phenomena Unit IV: Effects of Current Chapter – 12 Electricity

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.

### Chapter – 13 Magnetic effects of current

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.

## Theme: Natural Resources Unit V: Natural Resources

### Chapter – 15 Our Environment

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

## ONLY FOR INTERNAL ASSESSMENT

Note: Learners are assigned to read the below listed part of Unit V. They can be encouraged to prepare a brief write up on any one concept of this Unit in their Portfolio. This may be an assessment for Internal Assessment and credit may be given (Periodic assessment/Portfolio). This portion of the Unit is not to be assessed in the year-end examination.

### Chapter – 16 Management of natural resources:

Conservation and judicious use of natural resources. Forest and wildlife; Coal and Petroleum conservation. Examples of people’s participation for 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.

### TERM-I

LIST OF EXPERIMENTS

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

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

• Combination reaction
• Decomposition reaction
• Displacement reaction
• Double displacement reaction
• Action of water on quicklime
• Action of heat on ferrous sulphate crystals
• Iron nails kept in copper sulphate solution

D. Reaction between sodium sulphate and barium chloride solutions.

1.Observing the action of Zn, Fe, Cu and Al metals on the following salt solutions:

• $\mathrm{ZnSO}_{4}(\mathrm{aq})$
• $\mathrm{FeSO}_{4}(\mathrm{aq})$
• $\mathrm{CuSO}_{4}(\mathrm{aq})$
• $\mathrm{Al}_{2}\left(\mathrm{SO}_{4}\right)_{3}(\mathrm{aq})$

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

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

D. Determination of the focal length of (i) Concave mirror and (ii) Convex lens by obtaining the image of a distant object.

E. 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.

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

### TERM-II

LIST OF EXPERIMENTS

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.

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

## PRESCRIBED BOOKS:

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

## Assessment Areas (Theory) 2021-22 (Class X)

Science (086)

Theory Total Maximum Marks: 80

 Competencies Marks Demonstrate Knowledge and Understanding 46 % Application of Knowledge/Concepts 22 % Analyze, Evaluate and Create 32 %

Note:Internal choice would be provided.

## Internal Assessment – Term I and II (10 Marks each)

Periodic Assessment – 03 marks

Multiple Assessment – 02 marks

Subject Enrichment (Practical Work) – 03 marks

Portfolio – 02 marks

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