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.
Key Ideas. Substances heat or cool as a results of energy transfer; energy always transfers from the warmer object to the cooler one until both reach the same temperature; In most situations, more than one method of heat transfer takes place.