Question

Absolute humidity and relative humidity

Answer 1

The amount of water vapour present in the atmosphere is known as humidity.

Both absolute humidity and relative humidity are measures of water vapour. The difference between them is as follows:

Absolute Humidity	Relative Humidity
Absolute humidity is a measure of actual amount of water vapour present in the air regardless of the temperature of the air.	Relative humidity is the percentage of maximum amount of water vapour that air can hold at any given temperature.
Absolute humidity does not take into account the amount of possible water vapour in the air	Relative humidity accounts for maximum water vapour per unit/volume of air at a given temperature.
Absolute humidity is expressed in terms of units.	Relative humidity is expressed in terms of percentage.