Soil Worksheet-3

Soil Worksheet-3

Fill in Blanks

1. For soil formation to take place, bare rocks initially need to break up as a result of _____ process.

2. Topsoil is dark in colour due to the presence of _____.

3. The removal of trees on a large scale is known as _____.

4. Water logging takes place in ____ soil profile.

5. Soil is an important ____ resource.

6. Bacteria  and ____ organisms help in humus formation.

7. The ____ present in soil serve as useful nutrients for growth and development of plant body.

8. ____ is produced by mechanical weathering of rock and gets deposited in river beds.

9. Pesticide is a soil ____.

10. Soil ____, an effort practiced by all humans will prevent soil from erosion and help maintain its fertility and productivity.

True or False

11. The breaking up of rock into small particles is called erosion.

12. Clayey soil becomes sticky on adding water.

13. Soil contains air and moisture.

14. Earthworms excreta makes the soil fertile.

15. The first stage in soil formation is weathering.

Answer Key:

1. Weathering
2. Humus
3. Deforestation
4. Top
5. Natural
6. Fungi
7. Minerals
8. Soil
9. Pollution
10. Conservation
11. False
12. True
13. True
14. True
15. True