What is the boundary between cold and warm air masses

Front

Step-by-step explanation:

A front is the boundary between two air masses of different densities - 'warm' & 'cold'. There are four types of fronts;

Cold Front - The cold air mass is advancing. It replaces the warm air.

Warm Front - The warm air mass is advancing. It replaces the cold air.

Stationary Front - There is little to no advancement. Neither air mass is strong enough to replace the other.

Occluded Front - Formed during the process of cyclogenesis, when a cold front overtakes a warm front. When this occurs, the warm air is separated from the cyclone center at the Earth's surface.

Answer:Fronts are boundaries between air masses. Depending on the air masses involved and which way the fronts move, fronts can be either warm, cold, stationary, or occluded. In the case of a cold front, a colder, denser air mass lifts the warm, moist air ahead of it.

Step-by-step explanation:

fronts are the boundarys between cold air and warm air masses.