Atmosphere Book Back Questions & Answers
Unit 3 > Social > Class 9 > Samacheer Kalvi - English Medium
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1. _______is the most important gas for the survival of living organisms.
a. Helium
b. carbon-di-oxide
c. oxygen
d. methane
Correct answer: c. oxygen
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2. The lowest layer of the atmosphere is
a. Troposphere
b. Stratosphere
c. Exosphere
d. Mesosphere
Correct answer: a. Troposphere
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3. _______reflects radio waves.
a. Exosphere
b. Ionosphere
c. Mesosphere
d. Stratosphere
Correct answer: c. Mesosphere
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4. The average global surface temperature is
a. 12c
b. 13c
c. 14c
d. 15c
Correct answer: b. 13c
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5. The process of change of state of water from gaseous to liquid state is called
a. Precipitation
b. evaporation
c. transpiration
d. condensation.
Correct answer: d. condensation.
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6. The ________is the chief energy source of the Earth.
a. Sun
b. Moon
c. Stars
d. Clouds.
Correct answer: a. Sun
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7. All types of clouds are found in the_______
a. Troposphere
b. Ionosphere
c. Mesosphere
d. Exosphere
Correct answer: a. Troposphere
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8. ________ clouds are called 'Sheep clouds'
a. Alto-cumulus
b. Alto-Stratus
c. Nimbo - stratus
d. Cirro-stratus
Correct answer: a. Alto-cumulus
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9. The Monsoons are
a. Prevailing winds
b. Periodic winds
c. local winds
d. none of the above
Correct answer: b. Periodic winds
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10. Dew in the form of ice crystals is called ______
a. frost
b. fog
c. mist
d. sleet.
Correct answer: a. frost
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11. ________ is called the eye of the storm/ cyclone.
a. Pressure
b. wind
c. cyclones
d. snow.
Correct answer: a. Pressure
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12. The vertical movement of air is called
a. Wind
b. storm
c. Air current
d. drift
Correct answer: c. Air current
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1. Meteorology
Correct answer: study of weather
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2. Climatology
Correct answer: study of climate
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3. Anemometer
Correct answer: wind speed
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4. Wind Vane
Correct answer: direction of wind
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5. Mare's Tail
Correct answer: cirrus
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6. Leeward side
Correct answer: rain shadow region
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7. Willy willy
Correct answer: Australia