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3 Ways of Heat Transfer PowerPoint PPT Presentation


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3 Ways of Heat Transfer. Convection Conduction Radiation . Conduction. Conduction --transfer of heat between atoms as they collide within a substance 2 objects touching. Convection. Convection is the movement of matter due to differences in density that are caused by temperature

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3 Ways of Heat Transfer

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3 ways of heat transfer l.jpg

3 Ways of Heat Transfer

Convection

Conduction

Radiation


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Conduction

  • Conduction--transfer of heat between atoms as they collide within a substance

  • 2 objects touching


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Convection

  • Convection is the movement of matter due to differences in density that are caused by temperature

  • Important in weather, plate tectonics, and ocean currents


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Radiation

  • Radiation is the transfer of energy by electromagnetic waves, such as visible light and infrared waves

  • Key form = sunlight


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Phases of Matter

  • There are 3 main phases of matter:

    • Solid, Liquid, and Gas (a 4th is sometimes included—plasma)

    • Each phase requires a certain amount of kinetic energy


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Solids

  • Require the least amount of energy

  • Very low particle movement

  • Usually associated with low temperatures

  • When solids gain enough energy they change through a process called MELTING


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Liquids

  • More energy than solids, less than gases

  • Take the shape of their container because they have more freedom to move than solids

  • Liquids can lose energy to become solid through a process called FREEZING

  • Liquids can also gain energy to become gases through a process called EVAPORATION


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Gases

  • Have the most energy of the 3 phases

  • Particles move around very freely

  • Usually associated with high temperatures

  • If gases lose energy (temperature), they can change back to a liquid through a process called CONDENSATION


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