1. The microorganisms present in the soil require moisture (water) and nutrients for growth and survival. Choose from the options below the habitat (place) where the soil has plenty of water and nutrients.
(a) Desert
(b) Forest
(c) Open field
(d) Cricket ground
2. Availability of water and minerals in the soil for maximum absorption by roots is in the –
(a) B-horizon
(b) C-horizon
(c) A-horizon
(d) surface of soil
3. Soil conservation measures are mainly aimed at protecting which of the following?
(a) Plants
(b) Topsoil
(c) Subsoil
(d) Soil organisms
4. Read the following statements with reference to the soil.
- Weathering is a very fast process of soil formation.
- Percolation of water is faster in sandy soils.
- Loamy soil contains only sand and clay.
- Topsoil contains the maximum amount of humus.
Choose the correct statements from the above.
(a) (ii) and (iv)
(b) (i) and (iii)
(c) (ii) and (iii)
(d) (i) and (ii)
5.The soil has particles of different sizes. Arrange the words given below in increasing order of their particle size.
6. The components of loamy soil are ______, ______ and ______.
7. Read the following statements and give the appropriate terms for each of them.
(a) The process of breakdown of rocks by the action of wind, water, sunlight.
(b) Removal of topsoil during heavy rains or strong winds.
(c) Accumulation of wastes in the soil generated by human activity which alter the features of the soil.
(d) The process of movement of water into deeper layers of soil.
8. Unscramble the following jumbled words related to soil.
9. Which of the following situations – ‘A’ or ‘B’ – is advantageous for the absorption of water and minerals? Why?
Situation ‘A’: Growth and branching of roots in the C-horizon.
Situation ‘B’: Growth and branching of roots in A and B horizons.
10. Locate the following zones given as boxed items in Figure 9.1 which shows a diagram of the soil profile.
11. Match the animals in Column I with their natural place of dwelling (habitat) in Column II.
| Column-I | Column-II |
| a) Earthworm | i) Sand and beaches |
| b) Garden Lizard | ii) Burrows in soil |
| c) Crab | iii) Deep, narrow holes in dry soils |
| d) Rodents | iv) Surface of soil |
| e) Scorpion | v) Surface of shaded moist soils |
| f) Snails and snugs | vi) A horizon of moist soils |
12. Several terms related to soil are hidden in the squares given as Figure 9.2. Spot them and make a list. Two examples are given to you (atleast 10 more)
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