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Heat Transfer. Heat is transferred in three basic ways: CCR. Conduction : heat transfer within materials and between objects in contact. Vibrating loose atoms transferring energy to neighbors Conductors – conduct heat well (e.g. metals: silver, copper, iron)

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## Heat Transfer

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**Heat Transfer**Heat is transferred in three basic ways: CCR**Conduction: heat transfer within materials and between**objects in contact • Vibrating loose atoms transferring energy to neighbors • Conductors– conduct heat well (e.g. metals: silver, copper, iron) • Insulators – poor conductor, delay transfer of heat (e.g. wood, wool, air) • (Kinesthetic simulation – pass the ball)**Convection: heat transferred by flowing currents in a fluid**(liquid or gas) • Hot air rises (becomes less dense) and cools as it rises • Ex. Hot water heating in a home, air currents by lake**Examples**Weather Insulation Cooking**Radiation: heat transfer by electromagnetic waves, heat rays**• Needs no material medium (goes through a vacuum) • e.g Sun, fire, lamp filament

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