Question # 1

Thickness of atmosphere is.

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200 km

1000 km

1200 km

1600 km

The temperature in the mesosphere is

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-10°C

-100°C

-60°C

-80°C

The coldest layer of the atmosphere

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Troposphere

Stratosphere

Mesosphere

Thermosphere

Ultra violet radiations can cause.

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Cancer

Eye disease

None

Both a and b

The thickness of Atmosphere is

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100 km

200 km

300 km

400 km

Where the ozone make a protective layer?

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Troposphere

Stratosphere

Mesosphere

Thermosphere

How much population of Pakistan depends on agriculture

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90%

80%

60%

50%

The total number of people living together in an area at a particular time is called

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special

population

community

habitat

Ozone is a gas present in.

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Troposphere

Stratosphere

Upper stratosphere

Meso sphere

------------------ is one of oldes sources of heat.

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Petroleum

natural gas

None

Coal

The percentage of oxygen in Air is

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78%

21%

0.04%

33%

Teh total number of persons living in an area is called.

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Species

Population

Community

habitat

Atmosphere is made of................. percent oxygen.

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23

25

21

30

Pakistan's population is 1998 was..........

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130.5 million

13.5 million

135 million

0.135 million

The height of Stratosphere form sea level is.

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50 km

55 km

60 km

45 km

About ......... percent of Pakistan population depend upon agriculture.

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60

70

65

68

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