Convection+Currents

1.** The act or process of conveying; transmission.
 * Convection
 * 2.** //Physics//
 * a.** Heat transfer in a gas or liquid by the circulation of currents from one region to another.
 * b.** Fluid motion caused by an external force such as gravity.
 * 3.** //Meteorology// The transfer of heat or other atmospheric properties by massive motion within the atmosphere, especially by such motion directed upward.

Mass movement of subcrustal or mantle material as the result of temperature variations.
 * Convection Current**