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An Article on How Heat is Transferred

Conduction

Conduction is the transfer of heat between substances that are in direct contact with each other. Metal is a good conduction of heat. Conduction occurs when a substance is heated.


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Convection

Heat energy is transferred from hot places to cold places by convection. Convection happens when warmer areas of a liquid or gas rise to cooler areas in the liquid or gas. Cooler liquid or gas then takes the place of the warmer areas which have risen higher. This result is ongoing circulation.


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Radiation

Radiation is a type of heat transfer that does not need any contact between the heat source and the heated object unlike conduction and convection. Heat can be transferred though empty space by thermal radiation. Examples of radiation is the heat from the sun.


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