CBSE Class 7 Social Science Revision Assignment Set A

1. Give a term for the following

a. The waves that determine the structure of the earth

b. The rock whose original form has been changed due to heat or pressure

c. The sedimentary rock that is formed by decay of plants and animals

d. The sphere in which life exist

e. The layer of the earth that protects us from ultra violet rays of the sun

f. The first layer of the atmosphere

g. The instrument that measures the wind speed

h. The layer that helps radio communication

i. The other name of relief rainfall

j. It is the mixture of smoke and fog

2. Define the following terms

a. humidity b. precipitation c. tides d. tsunami

e. monsoon f. range of temperature g. wind h. rock

i. fossils j. lava

3. Change the underlined word and correct the statement.

a. Basalt is an intrusive igneous rock.

b. The polar winds are extremely hot wind.

c. A local wind always blows in the same direction.

d. A sea breeze moves towards the land during day.

e. Neap tide occurs during new moon and full moon day.

f. The oceanic crust is composed of silicon and aluminium.

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