Q5 of 24 Page 23

Give geographical reasons:

Cumulus clouds change into cumulonimbus clouds.

Cumulus and cumulonimbus clouds are low clouds. These are at an altitude of fewer than 2000 metres. Cumulus clouds are responsible for pleasant weather. Due to an increase in the vertical flow of air, cumulus clouds get turned into cumulonimbus clouds which leads to rain.


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5

Give geographical reasons:

The proportion of relative humidity changes according to altitude.

 5

Give geographical reasons:

Air becomes saturated.

 6

Solve the following:

When the temperature of the air is 30° C, its vapour-holding capacity is 30.37 gms/ cu.m. If absolute humidity is 18 gms / cu.m. then what would be the relative humidity?

 6

Solve the following:

What would be the absolute humidity of air if 1 cu.m. air contains 4.08 gms of vapour at 0°C temperature?