CBSE Class 9 Answered
How following factors contribute in formation of soil?
(a) Wind (b) Water (c) Sun
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
Expert Answer
(a) Wind: Strong winds erode rocks down and carries small rock pieces and sand from one place to other.
(b) Water: (i) Fast flowing water carries big and small particles of rock downstream. These rocks rub against each other and the resultant abrasion causes rocks to break into smaller particles.
(ii) Water expands on freezing. So, when it is deposited in crevices of rocks, it cracks rocks into smaller pieces.
(c) Sun: The sun heats up rocks during the day so they expand. At night, these rocks cool down and contract. This results in the formation of cracks and ultimately the huge rocks break into smaller pieces.
Answered by | 04 Jun, 2014, 03:23: PM
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