Soil Erosion

Q.

Define: i) Sheet rock ii) Causeway iii) Open scrub iv) Rock out crop v) Stoney waste

Q.

Question 10
Solve the following crossword puzzle with the clues given:

Across
2. Plantation prevents it.
5. Use should be banned to avoid soil pollution.
6. Type of soil used for making pottery.
7. Living organism in the soil.
Down
1. In a desert, soil erosion occurs through.
3. Clay and loam are suitable for cereals like.
4. This type of soil can hold very little water.
5. Collective name for layers of soil

Q.

Why Aluminium is used to pack the food items?

Q.

Question 9
Explain how soil pollution and soil erosion could be prevented.

Q. What is the process of wearing off of the banks of stream or river called?

1. Erosion
2. Irrigation
3. Percolation
4. Aeration

Q.

How to protect against erosion of topsoil?

Q.

Question 28
Soil erosion can be prevented by:

(a) raising forests
(b) deforestation
(c) excessive use of fertilizer
(d) overgrazing by animals

Q. Is it a good practice to remove grass and small plants that are growing in an open, unused field? Give reasons to support your answer. [3 MARKS]

Q.

Question 48
Fertile soil has lots of humus. Why?