part of b.ed course

2.  Our earth is made up rocks.
 Rocks are composed minerals.
 Our earth itself is changing.
 I.e., rocks are getting changed.

3.  The process of disintegration and
decomposition of rock in generally called
weathering .

4.  Composition and structure of rock
 Nature of ground slope
 Climatic variations
 Floral effects

5.  Wind
 Glacier
 Running water
 Sea waves
 under ground water

6. 1. Physical weathering
2. Chemical weathering
3. Biological weathering

7.  Also known as mechanical weathering.
 It is caused by the change temperature.
 Due to expansion and contraction rocks
break up.

8. Physical weathering happen due to the process of,
 Changing of temperature
 Freezing action of water
 Roots growing plants which disintegrate rocks

10.  Decomposition and disintegration of rocks
due to chemical reaction.
 Water causing a change in the chemical
composition of rocks.

12. 1.Solution
 It is refers to the dissolution of soluble particles and
minerals from the rocks.
2.Oxidation
 It is a reaction of atmospheric oxygen to from oxides.
3.Carbonation
 It is a reaction of carbonate or bicarbonate ions with
minerals.
4.Hydration
 The process of hydration is related to the addition of
water to the minerals.

13. Oxidation

14.  The action of plants and animals leads to
breaking of rocks.
 Roots causing disintegration of rocks.
 The roots of the trees penetrate into the
cracks of the rocks.

16.  Burrowing animals
 Quarrying
 By human excreta

17.  Weathering leads to soil formation.
 There are three types ,physical ,chemical
,biological weathering.
 Topography ,climate , characteristic of rocks
etc .. Influence weathering .