Soil – Maharashtra Board Class 8 Solutions for General Science (English Medium)
MathematicsGeneral ScienceMaharashtra Board Solutions
Solution 1.a:
Soil is made of stones, pebbles, sand, fine soil particles and organic substances.
Solution 1.b:
The constituents of plant origin in the soil include bacteria, fungi, algae, blue-green algae and decomposed leaves.
Solution 1.c:
The following steps can be taken to prevent erosion of soil:
- Soil must be kept covered by allowing the grass to grow and planting of trees.
- Bunds are built to stop the flowing water which washes away the soil and causes soil erosion.
- Soil erosion can be reduced by arranging soil horizontally across the line of the slope.
Solution 2:
a. False. The texture of soil can be determined by the proportion of the particles of different sizes.
b. False. Soil is eroded by the fast-flowing currents of water.
c. True
Solution 3:
| ‘A’ | ‘B’ |
| a. Algae | 2. Factors of plant origin |
| b. Soil erosion | 3. Wind |
| c. Social forestry | 1. Farming on fallow land |
Solution 4:
- Plants satisfy man’s basic needs for food, clothing and shelter.
- Plants and animals are the organic constituents of soil.
- Land should be covered to prevent erosion.
- Disturbance of the natural balance of soil is called soil pollution.
- The Government has started the social forestry project to protect forests.