HEAT TRANSFER…
can be accomplished through four means:
(1)Conduction:  fast-moving molecules of substance 1 collide with neighboring molecules of substance 2, which are moving more slowly.  This forces the molecules of substance 2 to speed up.  Substance 2 becomes hotter as a result of its physical contact with substance 1.  This form of heat transfer often occurs between the atmosphere and the earth’s surface and is also known as sensible heat flux.