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New_Ch02_Energy_107 - Ch 2 Energy Warming the Ch 2 Energy...

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Unformatted text preview: Ch. 2 Energy: Warming the Ch. 2 Energy: Warming the Earth and Atmosphere Earth and Atmosphere 2.1 Energy, Temperature, Heat 2.2 Heat Transfer in the Atmosphere 2.3 Radiation Absorption, Emission, Equilibrium Solar Energy Energy – What is it? Energy – What is it? Energy from the sun drives weather. Energy is the ability or capacity to do work on some form of matter. Matter – has mass and takes up space. Work – done on matter when a force causes the matter to move. The force “does work” on the matter and thus imparts energy upon it. Temperature – What Is It? Temperature – What Is It? http://www.atmos.uiuc.edu/courses/atmos100/all_programs.html Click here to activate this figure Temp. is “a measure of the average speed of the molecules ”. The faster speed, the higher temp. Three Phases of Water Water substance on earth can exist in-Vapor (gas phase)-Water (liquid phase)-Ice (solid phase) Each phase has an energy level. Vapor has highest energy since molecules move fastest, and ice has the lowest energy. Latent Heat – Hidden Warmth Phase change requires or gives off heat. Sensible heat absorbed in evaporation is stored in vapor as latent heat. This latent heat is released back as sensible during condensation. Evaporative Cooling/Condensational heating Evaporative Cooling Those escaping molecules (from water) are faster moving ones; those that stay in water are slower ones. The average molecular speed, i.e., temp., of water will be lower – evaporative cooling....
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New_Ch02_Energy_107 - Ch 2 Energy Warming the Ch 2 Energy...

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