Soil and its formation

Q.

What is eluviation and in which layer is this most likely to occur?

Q. Climate, , flora and fauna, altitude, and are the five major factors that contribute to soil formation.

1. time
2. parent rocks
3. weather
4. humidity

Q. The formation of what mainly depends on the original rock, climate, organic components, slope of the land and time?

1. River
2. Mountain
3. Air
4. Soil

Q. A period of X years may be required for the formation of a 2.5 cm thick layer of soil . What is X?

1. hundred
2. thousand
3. ten
4. million

Q. Soil is an important natural resource for ___

1. Agriculture
2. pottery
3. trading
4. cloth making

Q.

Name three different ways in which water causes weathering of rocks.

Q. The formation of soil is a ___ process

1. fast
2. slow
3. time independent
4. lengthy

Q. Select the correct option regarding the statements A and B.

A: Deforestation results in soil erosion.
B: The roots of plants cause cracks in rocks, leading to weathering

1. Both A and B are correct, and B is the correct explanation for A.
2. Both A and B are correct, and B is not the correct explanation for A.
3. A is correct. B is wrong.
4. B is correct. A is wrong.

Q. Plants obtain water and nutrients from soil.

1. True
2. False

Q. What factors influence the formation of soil?

Q. consists of a mixture of sand, silt, and clay.

1. Subsoil
2. Rock material
3. Bedrock

Q. Fertile agricultural soil appears deep coloured at the surface as compared to the colour one metre down. The reason for the colour of topsoil is due to:

1. Organic matter
2. Fertilizers
3. Moisture
4. Rocks

Q. is the first step in soil formation.

1. Weathering
2. Deposition
3. Topsoil formation
4. Climate change

Q. Different types of soil are formed according to the types of ___ and climates in different regions .

1. Ores
2. Rocks
3. Rivers
4. Plants