Cold
The boundary between a cold and warm air mass is called a front. One type of air will replace another as a front passes.
it is called a cold front
it is called a cold front
a warm front
An occluded front.
When a warm air mass moves into an area where a cold air mass is located, it is called a warm front. At a warm front, the warm air mass rises over the cold air mass, leading to gradual temperature increases and cloud formation.
it is called a cold front
it is called a cold front
it is called a cold front
it is called a cold front
it is called a cold front
it is called a cold front