Soil, Its four Layers, and the Process of Its Formation

Q.

Residual soils are also called

1. Sedentary soil

2. Loess

3. None of these

4. Sedimentary soil

Q. Which of these does not play a major role in soil formation?

1. Parent Rock
2. Humus
3. Time
4. Vegetation and other life forms

Q. Read the following statements and select the most appropriate option.

Statement 1 (S1): The rate of weathering does not depend on the weather conditions.
Statement 2 (S2): Slopes of mountain contain thicker deposits of weathered rock particles.

1. Both S1 and S2 are true.
2. Only S1 is true.
3. Only S2 is true.
4. Both S1 and S2 are not true.

Q. Which of the following layers of soil is a mixture of sand, silt and clay?

1. Sub soil
2. Top soil
3. Weathered rock material
4. Bedrock

Q. The removal of thin layers of soil, one after another, over a period of time is known as gully erosion.

1. True
2. False

Q. Weathering is the first step in the process of soil formation.

1. True
2. False