energy transfer

energy transfer-Any process in which a system interacts with its surroundings in such a way that the energy of the system increases (or decreases) while that of the surroundings decreases (or increases) by the same amount.

convection-transport of heat and moisture by the movement of a fluid.

conduction-The transfer of heat energy through a substance or from one substance to another by direct contact of atoms or molecules.

radiation-when heat transfers from one point to another.