Geography
Answer
| S. No. | Relative humidity | Absolute humidity |
|---|---|---|
| 1. | It is the ratio between the actual amount of water vapour present in the air and the maximum amount of water vapour, the air can hold at that temperature. | It is the actual amount of water vapour present in the air regardless of temperature. |
| 2. | It is always expressed as a percentage. | It is expressed as grams of moisture per cubic metre of air. |
| 3. | Relative humidity of the air decreases with increase in temperature and vice versa. | Absolute humidity is independent of temperature and change in temperature has no effect on absolute humidity. |
| 4. | Relative humidity is more reliable and it is a measure of atmospheric humidity. | It does not tell us the amount of water which the air needs to become saturated. |
| 5. | Relative humidity is more in the mornings and at night and less in the afternoon as the temperature goes up. | Absolute humidity decreases from equator towards poles. Hot air can hold more water vapour than the cold air. |
Related Questions
Give a reason for each of the following:
- Roaring forties and furious fifties are found in the Southern hemisphere.
- Low atmospheric pressure prevails over the circum polar region.
- Cyclones are always followed by anticyclones
Draw a well labelled diagram of sea breeze.
(i) Name the type of rainfall experienced in the Equatorial region.
(ii) State two characteristic features of the rainfall mentioned by you.
(i) How is dew formed?
(ii) How is frost different from dew?
(iii) Why is fog commonly formed in the winter season?