CBSE Board Science Syllabus for Class 10

                                                                                               CLASS X

FIRST TERM

Units
I.    Chemical Substances
II.    World of living
III.    Effects of Current
IV    Natural Resources
                                                                
Unit : 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 non metals : Properties of metals and non-metals, reactivity series, formation and properties of ionic compounds, basic metal urgical processes, corrosion and its prevention

Unit : 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 to plant hormones;
control and co-ordination in animals : nervous system; voluntary, involuntary and reflex action, chemical co-ordination:
animal hormones.

Unit : 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, paral el combination of resistors and its applications in daily life. Heating effect of Electric current and its applications in daily life.  Electric Power, Inter relation 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. Electro magnetic
induction. Induced potential difference, Induced current. Fleming's Right Hand Rule, Direct current. Alternating
current : frequency of AC. Advantage of AC over DC. Domestic electric circuits.

 
Unit : 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

PRACTICALS

FIRST  TERM

1.    To find the pH of the fol owing samples by using pH paper/universal indicator.
a.    Dilute Hydrochloric acid
b.    Dilute NaOH solution
c.    Dilute ethanoic acid solution
d.    Lemon juice
e.    Water
f.      Dilute sodium bicarbonate solution.

2.    To study the properties of acids and bases HCl & NaOH by their reaction with
a.    Litmus solution (Blue/Red)
b.    Zinc metal
c.    Solid sodium carbonate
3.    To study the dependence of potential difference (V) across a resistor on the current (I) passing through it and determine its resistance. Also plot a         graph between V and I.
4.    To determine the equivalent  resistance of two resistors when connected in series.
5.    To determine the equivalent  resistance of two resistors when connected in paral el.
6.    To prepare a temporary mount of a leaf peel to show stomata.
7.    To show experimental y that light is necessary for photosynthesis.
8.    To show experimental y that carbon dioxide is given out during respiration.
9.    To perform and observe the following reactions and classify them into:
 
i.      Combination reaction
ii.    Decomposition reaction
iii.    Displacement reaction
iv.    Double displacement reaction

1)    Action of water on quick lime.
2)    Action of heat on ferrous sulphate crystals
3)    Iron nails kept in copper sulphate solution
4)    Reaction between sodium sulphate and barium chloride solutions.

SECOND TERM

Units

I.    Chemical Substances -Nature and Behaviour
II.    World of living
III.     Natural Phenomena
IV    Natural Resources
                      
Unit : Chemical Substances - Nature and Behaviour
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 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, Modern Periodic table, gradation in Properties, valency, Atomic number, metal ic and non-metal ic properties.

Unit : World of living
Reproduction : Reproduction in animal and plants (asexual and sexual) reproductive health-need for and methods of family planning. safe sex vs HIV/AIDS. Child bearing and women's health.
Heridity and evolution : Heredity; Mendel's contribution- Laws for inheritance of traits: Sex determination: brief introduction; Basic concepts of evolution.
 
Unit : Reflection of light at 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 daily life.
                                                               
Unit  : Conservation  of natural  resources
Management of natural resources. Conservation and judicious use of natural resources. Forest and wild life, coal and petroleum conservation. Examples of People's participation for conservation of natural resources.
The Regional environment : Big dams : advantages and limitations; alternatives if any. Water harvesting. Sustainability of natural resources.
Our environment : Eco-system, Environmental problems, Ozone depletion, waste production and their solutions. Biodegradable and non-biodegradable, substances.

PRACTICALS

SECOND TERM

1.a)To observe the action of Zn, Fe, Cu and Al metals on the fol owing salt solutions.
 
i.ZnSO4 (aq.)
i.FeSO4 (aq.)
ii.CuSO4(aq.)
iv.Al2 (SO4)3(aq.)
b)Arrange Zn, Fe, Cu and Al metals in the decreasing order of reactivity based on the above result.

2.To study the following properties of acetic acid (ethanoic acid) :
 
i)odour

i)    solubility in water
ii)   effect on litmus
iv)   reaction with sodium bicarbonate

3.    To determine the focal length of
 
i.Concave mirr
i.Convex lens by obtaining the image of a distant object.

4.To trace 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.
5.To study (a) binary fission in Amoeba and (b) budding in yeast with the help of prepared slides.
6.To determine the percentage of water absorbed by raisins.