Soil, Its Four Layers, and The Process of Its Formation

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

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

Q. <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Which of the following factors affect soil formation?

1. Relief
2. Climate
3. Time
4. Soil texture

Q. Q1. Define Soil and Soil formation.
Q2. Explain types of Soil.
Q3. "The biotic elements play an important role in the development of vegetation". Explain the statement.
Q4. Explain the type of resources.

Q. <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Arrange the process of weathering in the order it occurs.

i) Rocks exposed to temperature changes undergo expansion and contraction.

ii) Ice or roots of plants widens the cracks.

ii) Rainwater enters the cracks and becomes ice when the temperature drops.

iv) Over a period of time the rocks break and disintegrate into many pieces.

1. i, ii, iii, iv
2. i, iii, ii, iv
3. ii, i, iii, iv
4. iii, ii, i, iv

Q. <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> The subsoil is a mixture of:

1. sand
2. silt
3. pebbles
4. clay

Q. <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> In which layer of the soil do we plant the seeds?

1. On top soil
2. On subsoil
3. On bedrock
4. On weathered rock