A. MULTIPLE CHOICE TYPE QUESTIONS : TICK (V) THE CORRECT ANSWER
1. In which of the following, humus is present in reasonable amount ?
4. B-horizon of the soil is lighter in colour due to the presence of lesser amount of
(c) C-horizon
(c) running water
(d) rain
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(a) A-horizon
(b) B-horizon
2. Which of the following does not cause weathering?
(a) wind
(b) clouds
B. FILL IN THE BLANKS TYPE QUESTIONS
1. The dark colour of the top soil is due to the presence of
2. Plantation of trees on large scale is called
3. Breaking down of rocks into smaller pieces by natural forces is called
5. The removal of the top soil by strong wind or by flowing water is called
C. TRUE OR FALSE TYPE QUESTIONS
1. Soil also contains some insects and micro-organisms.
2. Weathering is a very fast process.
3. Soil erosion is the removal of top soil by wind or flowing water.
4. The C-horizon is the layer of soil which is rich in humus.
5. Humus is important because it makes the soil fertile.
Answers
Answer:
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Multiple choice questions:
Explanation:
1. Humus is present in maximum amount in O horizon and also some reasonable amount is present in A horizon.
2. Clouds do not cause weathering as there is no direct relation of clouds in terms of breakdown of rocks, soils and minerals . It only happens when these come in contact with water , atmospheric gases and biological organisms.
B. Fill in the blanks:
1. The dark color of the top soil is due to the presence of decayed organic matter.
2. Plantation of trees on a large scale is Afforestation
3. Breaking down of rocks into smaller pieces by natural forces is called weathering.
4. The removal of the top soil by strong wind or by flowing water is called soil erosion.
C. True or false:
1. True
2. False. Weathering is a slow process.
3. True
4. False. O horizon of soil is rich in humus.
5.True