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Class 7 Ls Atmosphere

Total questions: 15

Worksheet time: 8mins

Name
Class
Date
1.

What gas makes up 21% of Earth's atmosphere ?

a)

Hydrogen

b)

Nitrogen

c)

Oxygen

d)

Sulphur dioxide

2.

Which layer of the atmosphere contains Ozone ?

a)

Mesosphere

b)

Stratosphere

c)

Troposphere

d)

Ionosphere

3.

The layer where most meteorites vaporise ?

a)

Mesosphere

b)

Troposphere

c)

Stratosphere

d)

Exosphere

4.

Most abundant gas in the Earth's atmosphere.

a)

Oxygen

b)

Hydrogen

c)

Nitrogen

d)

Ozone

5.

Temperature in the Stratosphere decreases as the altitude increases.

a)

True

b)

False

c)

not sure

d)

50% true

6.

Thermosphere is also called-

a)

Mesosphere

b)

Exosphere

c)

Terrosphere

d)

Ionosphere

7.

How high above the Earth's surface does the Stratosphere go ?

a)

100 Kms

b)

120 Kms

c)

50 Kms

d)

40 Kms

8.

Which is the hottest layer of the atmosphere ?

a)

Thermosphere

b)

Mesosphere

c)

Exosphere

d)

Stratosphere

9.

This layer in the atmosphere protects us from the harmful UV rays

a)

Oxygen

b)

Ozone

c)

Bromine

d)

Hydrogen

10.

Where do satellites orbit ?

a)

Mesosphere

b)

Thermosphere

c)

Ionosphere

d)

Exosphere

11.

Temperature in the Stratosphere increases with altitude due to

a)

UV Radiations

b)

Z- rays

c)

Greenhouse Effect

d)

Black holes

12.

Which is the uppermost layer of the atmosphere ?

a)

Thermosphere

b)

Exosphere

c)

Mesosphere

d)

Ionosphere

13.

This is not a Trace Gas present in the atmosphere.

a)

Nitrogen

b)

Carbon-di-oxide

c)

Helium

d)

Methane

14.

Lot of weather changes take place in this layer.

a)

Ionosphere

b)

Mesosphere

c)

Troposphere

d)

Stratosphere

15.

Mixture of gases and particles that surrounds a planet, held by gravity is called -

a)

Hydrosphere

b)

Atmosphere

c)

Macrosphere

d)

Microsphere