Page 189 - New Medley 3 Semester 2

Check Your Study
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A. Tick () the correct answers.

1. is is the largest particle in the soil.
(a) Clay (b) Sand (c) Silt (d) Mud

2. Soil contains
(a) plants (b) worms (c) bacteria (d) all of these

3. is is the lowermost layer of soil.
(a) Bedrock (b) Subsoil (c) Topsoil (d) Humus

B. Write True or False.
1. Soil forms by the cracking and breaking of rocks.

2. Sand is the best soil for growing plants.

3. Humus contains dead plants and insects.
4. Wet and sticky soil is called mud.

C. Answer these questions.

1. How do we get soil from rocks? 2. What is loamy soil made up of?

3. What is the advantage of humus? 4. Why is soil important to us?

Think and Answer • Critical Thinking

1. Why should we water the plants daily?

2. Diamond is used to cut hard materials. Why?
3. Why are the kitchen slabs and oors in the buildings made from marble and granite?

Can the kitchen slabs be made from wood?

Let Us Do

• Communication
1. What is the importance of earthworms in the soil? Discuss in the class.

2. Take soil from three di erent places such as the garden, roadside and river bank.
Put them in three separate pots and grow the same type of plants in each. Find

the di erence in the growth of the plants. Also, nd out the reason behind these

di erences.

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