CBSE - X

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Science Course Structure Class X (Theory)
One Paper Time : 2 1/2Hours; Marks : 60
UNITSMARKS
I Chemical Substances 18
II World of living 16
III Effects of Current 10
IV Light 08
V Natural Resources 08
  TOTAL 60
  Theme : Materials  
  UNIT 1 : CHEMICAL SUBSTANCES - NATURE AND BEHAVIOUR (55) Periods
  Acids,bases and salts : General properties, examples and uses.  
  Chemical reactions : 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 : Brief discussion of basic metallurgical processes. Properties of common metals. Elementary idea about bonding.  
  Carbon Compounds : Carbon compounds, elementary idea about bonding. Saturated hydrocarbons, alcohols, carboxylic acids (no preparation, only properties).  
  Some Important chemical compounds : Soap-cleansing action of soap.  
  Periodic classification of elements : Gradations in properties : Mendeleev periodic table.  
  Theme : The world of the living  
  UNIT 2 : OUR ENVIRONMENT (50) Periods
  Our environment : Environmental problems, their solutions. Biodegradable, non biodegradable, ozone depletion.  
  Life Processes : "living" things; Basic concept of nutrition, respiration, transport and excretion in plants and animals.  
  Control and Co-ordination in plants and animals : Tropic movements in plants; Introduction to plant hormones; control and co-ordination in animals : voluntary, involuntary and reflex action, nervous system; chemical co-ordination : animal hormones.  
  Reproduction: Reproduction in plants and animals. Need for and methods of family planning. Safe sex vs HIV/AIDS. Child bearing and women's health.  
  Heridity and evolution : Heridity; Origin of life : brief introduction; Basic concepts of evolution.  
  Theme : How things work.  
  UNIT 3 :EFFECTS OF CURRENT (35) Periods
  Potential, Potential difference, Ohm's law; Series combination of resistors, parallel combination of resistors; Power dissipation due to current; Inter relation between P, V, I and R.  
  Magnets: Magnetic field, field lines, field due to a current carrying wire, 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. Direct current. Alternating current; frequency of AC. Advantage of AC over DC. Domestic electric circuits.  
  Theme : Natural Phenomena  
  UNIT 4 :LIGHT (20) Periods
  Convergence and divergence of light. Images formed by a concave mirror; related concepts; centre of curvature; principal axis. Optic centre, focus, focal length. Refraction; laws of refraction. Image formed by a convex lens; functioning of a lens in human eye; problems of vision and remedies. Applications of spherical mirrors and lenses. Appreciations of concept of refraction; velocity of light; refractive index; twinkling of stars; dispersion of light. Scattering of light.  
  Theme : Natural Resources  
  UNIT 5 :NATURAL RESOURCES (20) Periods
  Conservation of natural resources : Management of natural resources. Conservation and judicious use of natural resources. Forest and wild life, coal and petroleum conservation. People's participation. Chipko movement. Legal perspectives in conservation and international scenario. The Regional environment : Big dams : advantages and limitations; alternatives if any. Water harvesting. Sustainability of natural resources. Sources of energy : Different forms of energy, leading to different sources for human use : fossil fuels, solar energy; biogas; wind, water and tidal energy; nuclear energy. Renewable versus non - renewable sources.  
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