Question

What is the lighter, less dense air and the downward movement of cool air called?

I just can't figure it out!!!!

Answer 1

I'd call it convection...the process in which the lighter, less dense hot air that rises and the cold air moves down to take it's place.

Explanation:

I suppose this is what you were asking...But convection is responsible for currents, winds etc and is a way of heat transfer, like conduction or radiation.