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1. The atmospheric layer closest to the earth is
a) Mesosphere
b) Hydrosphere
c) Troposphere
d) Ionosphere
2. Which one of the four regions above Earth has smallest height (KM)?
a) Stratosphere
b) Mesosphere
c) Thermosphere
d) Troposphere
3. Ozone layer in the outer atmosphere helps us in
a) Reflecting radio waves and makes radio communication possible
b) Regulating the temperature of atmosphere
c) Absorbing cosmic ray particles
d) Absorbing U-V radiations
4. Troposphere is the hottest part of the atmosphere because
a) It is closest to the sun
b) Heat is generated in it
c) It is heated by the Earth’s surface
d) There are charged particles in it
5. Which of the following statements regarding ozone layer within the atmosphere is/are correct
1. It absorbs most of the ultraviolet radiation found in the Sun’s rays
2. Chlorofluorocarbons are serious threat to the ozone layer.
Select the correct answer using the codes given below
a) Only 1
b) only 2
c) Both 1 and 2
d) Neither 1 nor 2
6. Which one of the following statements is true about Tropopause?
a) It is formed due to the meteoric dust particles
b) It is about 5-10 km thick
c) It is a zone of mixing
d) It’s average height is about 8 km over
7. What is the reason for the major hot deserts of the world lying in the Western part of the tropical latitude?
a) They are influenced by trade winds
b) They lie in the rain-shadow area of the mountains
c) They are influenced by monsoon winds
d) They are influenced by dry winds
8. The mass of water vapour per unit volume of air is known as
a) Relative humidity
b) Specific humidity
c) Absolute humidity
d) Variable humidity
9. What is the term used to denote the critical temperature at which the air becomes saturated with vapour and below which the condensation is likely to begin
a) Condensation point
b) Evaporation point
c) Dew point
d) Point of critical temperature
10. Which one of the following instruments is used for measuring the humidity of the air?
a) Wind vane
b) Aneroid barometer
c) Wet and dry bulb thermometer
d) Maximum and minimum thermometer
ANSWER:
1.C 2.D 3.D 4.C 5.C 6.C 7.D 8.C 9.C 10. C