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CBSE Class 7 Social Studies Worksheet

Geography - Air

1.
State Yes or No: On 17-18 October 1999, a cyclone hit five districts of the Bihar state.
A) Yes B) No
2.
Fill in the blanks: Exosphere layer helps in ____________ transmission.
3.
State Yes or No: Exosphere layer has very thin air.
A) Yes B) No
4.
State Yes or No: When people inhale, we take some amount of nitrogen into our lungs and exhale it.
A) Yes B) No
5.
State Yes or No: The temperature of the atmosphere changes not only between day and night but also from season to season.
A) Yes B) No
6.
State Yes or No: The mass of air that has made the temperature on the earth liveable.
A) Yes B) No
7.
Why level of greenhouse gas in the atmosphere increases?
8.
Fill in the blanks: ____________ are hotter than winters.
9.
State Yes or No: The 7 to 10 m high tidal wave intruded suddenly and caused massive damage to the standing paddy crops.
A) Yes B) No
10.
State Yes or No: Insolation is the incoming solar energy intercepted by the earth.
A) Yes B) No
11.
Fill in the blanks: In areas having lower temperature, the ____________ is cold.
12.
Fill in the blanks: In fact, radio waves transmitted from the ____________ are reflected back to the ____________ by exosphere.
13.
Fill in the blanks: Forms of precipitation are ____________, sleet, hail.
14.
What makes a perfect balance in the atmosphere?
15.
Fill in the blanks: In areas where ____________ is high the air gets heated and rises.
16.
State Yes or No: The uppermost layer of the atmosphere is known as the Exosphere.
A) Yes B) No
17.
Fill in the blanks: Plants can not take nitrogen directly from the ____________.
18.
Fill in the blanks: When the ____________ rises, it starts cooling.
19.
Fill in the blanks: When the level of ____________ gas in the atmosphere increases due to factory smoke or car fumes, the heat retained increases the temperature of the earth.
20.
What is the wind?

CBSE Class 7 Social Studies Worksheet

Geography - Air

Answers

1.
Option B

2.
Radio
3.
Option A
4.
Option A
5.
Option A
6.
Option A

7.
When the level of green house gas in the atmosphere increases due to factory smoke or car fumes, the heat retained increases the temperature of the earth.
8.
Summers
9.
Option A
10.
Option A

11.
Air
12.
Earth
13.
Snow
14.
The amount of carbon dioxide released by humans or animals seems to be equal to the amount used by the plants which make a perfect balance in the atmosphere.
15.
Temperature
16.
Option A

17.
Air
18.
Water vapour
19.
Green house
20.
The movement of air from the high-pressure area to low-pressure areas is called the wind.
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