CBSE Class 7 Science Soil Assignment Set A

I. Fill in the blanks:-

1. Water seeps __________ through sandy soil than clayey soil.

2. Soil is formed by __________ of rocks.

3. _______ soil is formed in tropical countries.

4. _______ soil is found in Gujarat.

II Choose the correct option:-

1. The smallest particles of soil are called

(a) Clay

(b) Sand

(c) Silt

(d) Gravel

2 The hard layer of rocks below the C horizon is called

(a) Bottom Rock

(b) Substratum

(c) Bed Rock

(d) Gravel

3 The Decomposition of Organic matter forms

(a) Humus

(b) Coarse soil

(c) sandy soil

(d) all

4 A protozoan which help to improve the fertility of soil is

(a) Algae

(b) Fungi

(c) Amoeba

(d) bacteria

III Name the following:-

1. Soils which are light and easy to plough.

2. Living Organisms in the soil are referred as.

3. Soil formed by weathering of volcanic rocks.

4. Soil made up of sand ,silt and clay particles which is best for the growth of plants.

IV Define the following :

1 Lateritic soil

2. Alluvial soil

V Draw the following diagrams:

1. Structure of clayey soil

2. Layers of soil

‣ Soil

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