Q. Consider the following statements:

1. The thin layer of grainy substance covering the surface of the earth is called soil.
2. Soil is made up of organic matter, minerals and weathered rocks found on the earth.
3. Weathering is the breaking up and decay of exposed rocks.

Which of the above is / are correct?
Answer: 1, 2 & 3
Notes: The thin layer of grainy substance covering the surface of the earth is called soil. It is closely linked to land. Landforms determine the type of soil. Soil is made up of organic matter, minerals and weathered rocks found on the earth. Weathering is the breaking up and decay of exposed rocks, by temperature changes, frost action, plants, animals and human activity.