Conduction - The transfer of thermal energy through vibrations of atoms (and diffusion of free electrons in metals), Convection - The transfer of thermal energy in a liquid or gas by warmer, less dense parts floating above colder parts, Infra red - The transfer of thermal energy by rays being emitted from a warm object, Evaporation - The changing of state of a liquid into a gas which has the effect of cooling the liquid, Condensation - The changing of state of a gas into a liquid which has the effect of warming the liquid,

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