Physical Geography - Atmosphere - MCQs with answers
1. Which of the following affects atmospheric pressure? a) Altitude
b) Temperature
c) Earth rotation
d) All the above
View Answer / Hide AnswerANSWER: d) All the above
The pressure exerted by air on the surface of the earth is called as atmospheric pressure. The pressure varies from region to region.
i) Air pressure decreases when air descends.
ii) Air pressure at sea level is lower than at the mountain top.
a. i only
b. ii only
c. Both
d. None
View Answer / Hide AnswerANSWER: d. None
Air pressure increases when air descends. Air pressure at sea level is higher than at the mountain top.
i )The temperature of air rises when its pressure falls.
ii )The pressure of the air falls when the temperature rises.
a. i only
b. ii only
c. Both
d. None
View Answer / Hide AnswerANSWER: b. ii only
The temperature of air falls when its pressure falls and the pressure of the air rises when the temperature falls.
i )Low temperature at poles cause air to expand.
ii ) High temperatures along equator cause air to contract.
a. i only
b. ii only
c. Both
d. None
View Answer / Hide AnswerANSWER: d. None
Low temperature at poles cause the air to contract. High temperatures along the equator causes air to expand.
i ) Lower layers of atmosphere have low pressure.
ii ) higher layers of atmosphere have high pressure.
a. i only
b. ii only
c. Both
d. None
View Answer / Hide AnswerANSWER: d. None
Lower layers of atmosphere have high pressure because the density is greatest at lower layers and are compressed. Higher layers of atmosphere have low pressure because they are less compressed.
i )The gradual dissipation of the frontal zone is called frontogensis.
ii) The process by which two air masses of different physical characteristics are brought together is frontolysis.
a. i only
b. ii only
c. Both
d. None
View Answer / Hide AnswerANSWER: d. None
The gradual dissipation of the frontal zone is called frontolysis. The process by which two air masses of different physical characteristics are brought together is Frontogensis and it leads to the formation of a temperate cyclone.
a) Specific Humidity
b) Relative humidity
c) Absolute Humidity
d) None of the above
View Answer / Hide AnswerANSWER: a) Specific Humidity
Specific humidity is expressed as grams per kg of air. The temperature at which saturation occurs is called dew point. The weight of water vapour per unit weight of air is called specific humidity.
a) Specific Humidity
b) Relative Humidity
c) Absolute Humidity
d) None of the above
View Answer / Hide AnswerANSWER: c) Absolute Humidity
Absolute humodity is expressed as grams per cubic metre of air. It is the weight of actual amount of water vapour present in a unit volume as air.
a) Specific Humidity
b) Relative Humidity
c) Absolute Humidity
d) None of the above
View Answer / Hide AnswerANSWER: b) Relative Humidity
Relative humidity is expressed in terms of percentage. It is the ratio of the actual water vapour content of the air to its water vapour capacity at a given temperature.
1. Cirrus ------------- A. feather
2. Cumulus ------------ B. Heap
3. Stratus ------------ C. Layer type
4. Nimbus ------------- D. Rain cloud
a. 1A, 2B, 3C, 4D
b. 1A, 2C, 3B, 4D
c. 1C, 2A, 3D, 4C
d. 1D, 2C, 3B, 4A
View Answer / Hide AnswerANSWER: a. 1A, 2B, 3C, 4D
There are different types of clouds. Cirrus clouds are very high clouds. Cumulus clouds have flat bases and rounded tops. Stratus clouds ly in the level sheets.
