This is because Hg is an abbreviation of the Latin name of the element, which was hydrargium. With this name the Greeks were referring to the fact that mercury is a silvery liquid at room temperature, rather than a solid like other metals.
We've looked at the three types of heat transfer. Conduction and convection rely on temperature differences; radiation does, too, but with radiation the absolute temperature is important.
Convection Currents and the Mantle. Heat Transfer. The movement of energy from a warmer object to a cooler object is called heat transfer. The direction of heat transfer is always from a warmer substance to a cooler substance.