Formation of Soil

Q. How long does it take for the formation of 1cm of soil?

1. 1 year
2. 10 years
3. 50 years
4. 100+ years

Q.

How does the process of biological weathering take place?

Q. Select the major factors responsible for soil formation.

1. Parent rocks
2. Wind velocity
3. Humidity
4. Climate
5. Whether
6. Altitude
7. Flora
8. Sunlight
9. Fauna
10. Time

Q. How does the thickness of the soil increase over time?

1. By erosion of the soil.
2. By the deposition of weathered particles.
3. By the breaking of bed rock.
4. By the decaying plant and animal matter.

Q. Which of the following layers of soil is a mixture of sand, silt, and clay and consists mainly of minerals and leached materials such as iron and aluminium compounds?

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

Q. What is the first step in soil formation?

1. Weathering
2. Deposition
3. Curing
4. Erosion

Q. The rate of weathering is determined by the climatic conditions of a place.

1. True
2. False

Q.

Write two features of dry land farming

Q. <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Soil is formed due to which of the following events?

1. Climatic changes
2. Natural vegetation
3. Grazing of animals
4. Parent rock

Q. Consider the following two places:
Place A: An arid desert which experiences sandstorms from time to time.
Place B: A land at the foothills of a mountain range.

Which of the following places would you expect to be better suited for agriculture?

1. Place A
2. Place B
3. Cannot say
4. Both places would be equally suitable