Question

As an air mass cools to its dew point-

Answer 1

When an air mass contains the maximum amount of water it can hold , it is saturated with water vapour. As the air cools , the relative humidity increases. If the air mass were cooled enough to become saturates , condensation would occur. This temperature is called the dew point.

Answer 2

Increase in the relative humidity and occurrence of condensation process, forming clouds

Step-by-step explanation:

Dew point is usually defined as the temperature up to which an air mass is allowed to cool and become saturated with water vapor.

When a warm and less dense air rises up, it cools. Similarly, under certain conditions, near the surface of the earth, these air mass sometimes cools. This results in an increase in the relative humidity, where the air is completely saturated with water vapor. This eventually leads to the occurrence of condensation processes and helps in the formation of clouds in the higher atmosphere and fogs at the earth's surface.

Thus, when an air mass cools down to reach its dew point, the relative humidity increases and the occurrence of condensation process leads to the formation of clouds.