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Earth science 17.2
 

Earth science 17.2

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    Earth science 17.2 Earth science 17.2 Presentation Transcript

    • 17.2 Heating the Atmosphere
    • Heat
      Thermal energy transferred from one object to another.
    • Temperature
      A measure of the average kinetic energy of individual atoms or molecules in a substance.
    • Conduction
      The transfer of heat through matter by molecular activity; Energy is transferred through collisions from one molecule to another.
    • Convection
      The transfer of heat by the movement of a mass or substance; It can take place only in fluids.
    • Radiation
      The transfer of energy (heat) through space by electromagnetic waves.
    • Reflection
      The process whereby light bounces back from an object at the same angle at which it encounters a surface and with the same intensity.
    • Scattering
      The redirecting (in all directions) of light by small particles and gas molecules in the atmosphere; The result is more light rays with weaker intensity.
    • Greenhouse Effect
      The heating of Earth’s surface and atmosphere from solar radiation being absorbed and emitted by the atmosphere, mainly by water vapor and carbon dioxide.
    • Key Concept
      How are heat and temperature related?
      Heat is transferred from one object to another because of a difference in their temperatures.
    • Key Concept
      What are the three major mechanisms of heat transfer?
      Three mechanisms of energy transfer as heat are conduction, convection, and radiation.