4. When the rocks break into small pieces like this is
called weathering . As the action continues,
T he size of the rocks reduces and makes way for
soil formation.
weathering is mainly of three types.
Mechanical weathering , chemical weathering
and biological weathering.
5. Changes in temperature and the freezing of the
water in the cracks of the rocks cause
mechanical weathering
6.
7. Some times the nitrogen and carbon dioxide in
the atmosphere dissolve in rain water. When
the rain falls on the rocks chemical action
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 called
chemical weathering
8.
9. Observe the picture, The roots of the trees
penetrate into the cracks of the rocks and
small creatures make their homes in these
spaces. These is called biological weathering.
