How soil is formed?
Science
Class 9
1576
Alexandria
Soil is formed by breaking down of rocks at or near the surface of the earth through various physical, chemical, and biological processes by various factors such as the sun, water, wind, and living organisms
Sun:
During day time, the rocks are heated up by solar rays. This causes the rocks to expand. During night time, these rocks cool down and contracts, thus the cracks devlop in the rock and they break down.
Water:
It helps in breaking of rocks in two ways:
Wind:
Strong winds carry away rocks, which causes rubbing of rocks. This results in the breaking down of rocks into smaller and smaller particles.
Living Organism:
Some living organisms like lichens help in the formation of soil. Lichens grow on rock surfaces and converts them into powdery form and make soil layer. In the same way, the plants like moss also help in the making of fine soil particles.