It doesn't they both are two completely different things, and they don't transform into one and other. The scientific names for air mass's descriptions are:
Cool = Polar
Warm = Maritime
Dry = Continental
Moist = Oceanic
A cold front occurs when a cool air mass pushes into a warmer one. Since cool air is denser than warm air, the warm air mass gets forced up and over the cooler one. As the air rises it cools, causing moisture in it to condense into clouds and rain.
The soil has to be warm/moist to help the plant grow but the leaves are cool because if they were warm they would dry out.
a warm front
Warm and moist
Thunderstorms most often form when a mass of warm, moist air collides with a mass of cool air, dry air, or both. If the wind speed and direction changes with altitude (a condition called wind shear), the storms may start rotating, which gives them the potential to produce tornadoes
cool moist air
A tornado usually requires a warm, moist air mass, most often when it collides with a cool and/or dry air mass.
In a warm and moist place.
a warm, moist, and unstable air massa warm, moist, and unstable air mass
maby??
Generally tornadoes form near a boundary between warm, moist air and cool, dry air. The warm, moist air mass is more important as it provide the energy that fuels the storm.
A cold front occurs when a cool air mass pushes into a warmer one. Since cool air is denser than warm air, the warm air mass gets forced up and over the cooler one. As the air rises it cools, causing moisture in it to condense into clouds and rain.
The soil has to be warm/moist to help the plant grow but the leaves are cool because if they were warm they would dry out.
a warm front
warm gas
Warm and moist
maby??