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

Q. The soil in the Himalayas are acidic with low humus content.

1. True
2. False

Q. Which of the following layers of soil is also known as parent rock?

1. Topsoil
2. Subsoil
3. Bedrock
4. Weathered rock

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

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

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

1. Presence of Chemical Fertilizers and Pesticides
2. Parent Rock
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. Weathering is the first step in the process of soil formation.

1. True
2. False

Q. In the states of Punjab, Haryana, western Uttar Pradesh, ________ is responsible for land degradation

1. Deforestation
2. Mining
3. Mineral processing
4. Over irrigation