It's called a warm front.
this is called cats
Under, cool air is heavier.
Regions of cold heavy air are called highs. As cool air moves under warm air, the warm air is pushed upward.
The cold air pushes under the warm air.
The process of warm air rising and cool air sinking is called convection current The process of warm air rising and cool air sinking is called convection current
Actually, cool air tends to be more dense and flow under warm air
when warm air meets cool air and either one don't move its called a stationary front
Warm air is less dense than cool air.
Warm air is above cool air.
Convection
um i think cold air follows warm air
A mass of cold air replacing warm air is called a 'cold front', - this usually causes rain.