Page 55 - Social Science 2_flatten

Wind-up
• Soil is the topmost layer of the Earth’s surface which supports life.

• Soil formation is a very long process that involves weathering of rocks.
• The main types of soil found in India include alluvial soil, black soil, red soil and
laterite soil.

• Soil erosion is caused by running water, wind, overgrazing by animals and human
activity such as constructions.
• Soil erosion can be controlled by afforestation, building bunds, terrace farming
and crop rotation.

Work to Progress

A. Darken the correct op ons in the OMR SHEET.
Omr Sheet
1. New alluvial soil is called :

a. bhangar b. khadar
c. humus d. silt

2. The soil in the delta regions is ideal for :

a. jute cultivation b. wheat cultivation
c. paddy cultivation d. oil seeds cultivation
1. a b c d
3. Red soil has a high content of :

a. zinc b. iron
2. a b c d
c. sulphur d. phosphorus

4. Soil erosion is severe in :
3. a b c d
a. hilly and dry regions b. desert and dry regions
c. plains and hilly areas d. none of these
4. a b c d
5. The fertility of soil can be maintained by :
a. crop rotation b. using pesticides
5. a b c d
c. using natural fertilisers d. both a. and c.

B. Fill in the blanks using the correct words from the box.

sand, weathering, topmost, silt, Regur, humus

1. Soil is the ____________ layer of the Earth’s surface.
2. The breaking of rocks by agents of erosion is called ____________ .

3. The decayed plant and animal matter that makes soil fertile is called _________ .

4. Alluvial soil is made up of ____________ and ____________ .
5. ____________ is another name for black soil.

55 SST-4