Question

Name  the  different  types  of weathering  and  explain  any  one  in  detail.

TNSCERT Class 7 Geography Ch2. The surface of the earth the changing face of the earth

Answer 1

Cloudy ( composted of water droplets unless temperatures are cold), dust storm ( sand or dirt is picked up from the ground due to wind), Freezing rain ( "ice" occurs when a thin layer of freezing), lightening ( discharge of electricity in the atmosphere) etc

Answer 2

There are three types of weathering physical,chemical and biological.
Physical weathering occurs by the effect of changing temperature of rocks, causing them to break them apart which is sometimes assisted by water.
Chemical weathering occurs when rain water reacts with the mineral grains in rocks which forms new clays and soluble salts. These reactions occur particularly when water is slightly acidic.
Living organisms contribute in biological weathering.
Two main types of physical weathering are freeze-thaw and exfoliation
Freeze thaw is caused by water which seeps into cracks, freezes and expands which break it apart. The weathering in which curved plates of rock are stripped from rock below is called exfoliation.