... Without the material or the substance moving. Convection happens in liquids and gases it is the transfer of energy (heat) by the movement of a liquid or a gas due to differences in density. Water is heated and Water cools, Becomes less dense becomes more And rises. Dense and sinks. Convection current is set up which carries heat around the beaker. Radiation Is the transfer of energy (heat) from one place to another by means of electromagnetic waves. Every object radiates infrared radiation; black matt surfaces are best at absorbing and emitting this. White, silvery, shiny surfaces are the worst absorbers and emitters Radiation travels through anything see-through including a vacuum. E.g. Tin foil would stop radiation. Evaporation In a liquid the hottest particles are moving the Fastest, fast moving particles near the liquid Surface are likely to break free of the liquid and Evaporate. Only the fastest particles will achieve this, leaving the slower "cooler" particles behind. This ...

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