Circulating fluid carries heat in this process, as warm air rises above a radiator.

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Your new ahaConvection

Convection: Transfer of heat through the movement of fluid or gas. Source: Convection ↗

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19Heat travels through a metal spoon left in hot soup by this process.RECALL
Conduction
Conduction passes heat directly between touching materials, heating a metal spoon left in hot soup.
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20A campfire warms you from a distance through heat carried by electromagnetic waves.RECALL
Thermal Radiation
Thermal radiation carries heat as electromagnetic waves, letting a campfire warm you without direct contact.
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21Light ejects electrons from a material in this effect, whose explanation helped earn Einstein a Nobel Prize.RECALL
Photoelectric Effect
The photoelectric effect releases electrons when light hits a material, and Einstein's explanation of it won a Nobel Prize.
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