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Understanding Methods of Energy Transfer: Conduction, Convection, and Radiation

This overview explores the three primary methods of energy transfer: conduction, convection, and radiation. Conduction occurs through particle collisions in substances contact, exemplified by heating a marshmallow with a wire rod. Convection involves the movement of fluids at different temperatures, demonstrated by fire embers rising and cooling. Lastly, radiation is the transfer of energy via electromagnetic waves, which can occur in a vacuum, as seen when standing near a campfire outside convection currents.

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Understanding Methods of Energy Transfer: Conduction, Convection, and Radiation

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Presentation Transcript

  1. Methods of energy transfer

  2. Conduction • The transfer of energy as heat between particles collide within a substance or between two objects in contact • Two objects of unequal temperature in contact • Ex. Heating a marshmallow at a campfire with a wire rod. What happens?

  3. Convection • The transfer of energy by the movement of fluids (liquid or gas) with different temperatures • Ex. Fire embers at campfire • Particles in solids are not as free to move • Convection currents- cycle of heated fluid rising and then cooling and falling

  4. Radiation • The transfer of energy by electromagnetic waves (infrared radiation, visible light, ultraviolet rays) • Does not involve the movement of matter • Only method of energy transfer that can occur in a vacuum (outer space) • Ex. Standing by campfire, outside of convection current

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