Water in the Atmosphere Test - 1

Stratus: As their name implies, these are layered clouds covering large portions of the sky.

In the mist, each nucleus contains a thicker layer of moisture. Mists are frequent over mountains as the rising warm air up the slopes meets a cold surface.

An increase in temperature increases the water absorption and retention capacity of the given parcel of air. 

The amount of water vapour in the atmosphere is added or withdrawn due to evaporation and condensation respectively. Evaporation is a process by which water is transformed from liquid to gaseous state. Heat is the main cause for evaporation. The temperature at which the water starts evaporating is referred to as the latent heat of vapourisation.

Cirrus clouds are formed at high altitudes (8,000 - 12,000m).  They are thin and detached clouds having a feathery appearance. They are always white in colour.

Condensation takes place when the dew point is lower than the freezing point as well as higher than the freezing point.

Oxygen is the most important element for living beings because 90 percent of human's biochemical and metabolic activities need oxygen.

Cumulus clouds look like cotton wool. They are generally formed at a height of 4,000 - 7,000 m. They exist in patches and can be seen scattered here and there. They have a flat base.

The percentage of moisture present in the atmosphere as compared to its full capacity at a given temperature is known as relative humidity.

When the water containing air becomes saturated, then clouds will be formed.