describe the different processes involved in mechanical weathering of class 9 short question answer
Answers
Answer:
When rocks disintegrate or break up without experiencing any change in their chemical composition, it is known as mechanical weathering. Thermal expansion and contraction that happens due to the increase or decrease in temperature. This process causes the rock to break into fragments. There are five major types of mechanical weathering: thermal expansion, frost weathering, exfoliation, abrasion, and salt crystal growth.
Answer:
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Explanation:
The different process in mechanical weathering are:
1) Corrosion: It is a physical process by which rocks and clasts are reduced in size. Corrosion by water, ice, and wind processes loaded with sediments can have immense cutting power.
2) Frost wedging: It results when the formation of ice widens and deepens the cracks, breaking off pieces and slabs.
3) Exfoliation: Granitic rocks which are formed by the cooling magma and are later exposed by uplifting and erosion may “exfoliate”:
4) Biological activity: Rocks falling off cliffs or steep slopes because of the tug of gravity or landslides split into smaller pieces.