Discussion :: Atmosphere
- What causes snowfall?
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A.
When condensation takes place below 0° C and precipitation occurs in the form of flakes |
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B.
When rain freezes into snow-flakes while passing through the atmosphere |
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C.
When condensation takes place in form of fog and precipitation occurs as flakes |
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D.
When the air temperature is much lower than surface temperature |
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Answer : Option A
Explanation :
When condensation takes place below 0° C and precipitation occurs in the form of flakes causes snowfall. If the humidity below the cloud base is low, the crystals may evaporate after leaving the cloud and so never reach the ground. If the temperature at the cloud base and just below it is close to zero, the snow crystals will tend to aggregate and form snowflakes.
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