The wearing away of soil by water or wind is called :
Conservation
Erosion
Preservation
Prevention
What is afforestation?
Planting of trees
Cultivation of crops
Disappearance of forests
Depletion of forests
The mineral and organic materials on the surface of the earth is:
Soil
Gravel
Rocks
Humus
The sowing of different crops at different times of the year is called:
Crop rotation
Crop reflection
Crop harvesting
Crop fertilization
How is soil formed?
By breaking down of mountains
By breaking down of hills
By breaking down of stones
By breaking down of rocks
Which layer of the soil contains moisture and nutrients necessary for the growth of plants?
Top soil
Sub soil
Parent soil
Bedrock
Hard, solid parts of the earth are called:
Minerals
Matter
Molecule
The upper layer of the soil is called the:
Subsoil
Deforestation refers to:
Why is soil important?
Because it provides home for animals
Because we need soil to live
Because of its ability to let plants grow in it
Because animals need soil to grow
