Power point presentation

1. 03/10/2015POSTED BY , SMITHA SURENDRAN at 02.40
PRESENTED BY:-
SMITHA SURENDRAN
SOCIAL SCIENCE
REG NO.16914367018
Weathering

2. WELCOME

3. WEATHERING
 When the rocks break in to small pieces it is
called weathering

4. 1.MECHANICAL WEATHERING
2. CHEMICAL WEATHERING
3.BIOLOGICAL WEATHERING
Designed by smitha surendran

5. MECHANICAL WEATHERING
During the day rocks expand due to the
heat of the sun.Changes in temperature
and the freezing of the water in the cracks
of the rocks cause mechanical weathering
During the day, the heat of the sun cause
the snow to melt and water fills the cracks
in the rocks.

6. CHEMICAL WEATHERING
Sometimes the nitrogen and carbondioxide in the atmosphere dissolve
in the rain water.When the rain water dissolved with nitrogen and
carbon dioxide in the atmosphere falls on the rocks , chemical
reactions takes place between the minerals in the rocks and the rain
water.As a result of this, there can be disintegration of rocks.This is
calledChemichal weathering

7. BIOLOGICAL WEATHERING
When roots of the trees penetrate into the cracks of the rocks
and small creature make their homes in these spaces.
These also causes disintegration of rocks.This is called
biological weathering

8. SATURDAY
03/10/2015