Which of the following is not necessarily a property of an air mass?
a. it must have a warm front at its leading edge.
b. it must be large.
c. it must have relatively uniform properties.
d. it must travel as a recognizable entity.

a.

Explanation:

a

The property of air mass include

1) it must be large.

2) it must have relatively uniform properties.

3)it must travel as a recognizable entity.

It must have a warm front at its leading edge, is not necessarily a property of an air mass because Not all air masses have a warm front at their leading edge. There are five types of air masses and different types of the front can be developed.

ice to water 1 water to vapour 2 latent heat