New Revised Syllabus : Class 10 (Science). Uttarakhand Board 2020-21

 Class – X

REVISED SYLLABUS

(For the Session of 2020-21 Only)

SCIENCE

(THEORY)

Theme : Materials

Unit 1 : Chemical Substances - Nature and Behaviour

Acids, bases and salts : General properties, examples and uses, concept of pH scale, importance of pH in everyday life; preparation and uses of sodium hydroxide, Bleaching powder, Baking soda, washing soda and Plaster of Paris.

Chemical reactions : Chemical Equation, Types of chemical reactions : combination, decomposition,displacement, double displacement, precipitation, neutralization, oxidation and reduction in terms of gain and loss of oxygen and hydrogen.

Metals and non metals : General properties of Metals and Non-metals, reactivity series, Formationand properties of ionic compounds, 

Carbon Compounds : Covalent bonding in carbon compounds. Versatile nature of carbon,

Periodic classification of elements : Modern Periodic table, Gradation in Properties.

Theme : The world of the living

Unit 2 : World of Living

Life Processes : "living" things; Basic concept of nutrition, respiration, transport and excretion inplants and animals.

Reproduction : Reproduction in animal and plants (asexual and sexual). Need for and methods offamily planning. Safe sex vs HIV/AIDS. Child bearing and women's health.

Heridity and evolution : Heridity; Origin of life : brief introduction;

Theme : How things work.

Unit 3 : Effects of Current

Potential difference and electric current. Ohm's law; Resistance, Factors on which the resistance of a conductor depends. Series combination of resistors, parallel combination of resistors; Heating effect of Electric current; Electric Power, Inter relation between P, V, I and R.

Magnets : Magnetic field, field lines, field due to a current carrying wire, field due to current carryingcoil 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

Theme : Natural Phenomena

Unit 4 : Reflection of light at curved surfaces, Images formed by spherical mirrors, centre ofcurvature, 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; Refraction of light through a prism, dispersion of light, scattering of light, applications in daily life.

Theme : Natural Resources

Unit 5 : Conservation of natural resources :Management of natural resources. Conservation andjudicious 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. Waterharvesting. Sustainability of natural resources.

Our Environment : Eco-system, Environmental problems, their solutions. Biodegradable and non-biodegradable, substances ozone depletion.