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Chapter 23 Section 2 Review Page 586 #‘s 1-6 “Clouds and Fog”

Chapter 23 Section 2 Review Page 586 #‘s 1-6 “Clouds and Fog”. 1. Describe the conditions that are necessary for clouds to form. You need particulates (dust, pollen, etc.) with water vapor and a temperature below the dew point so that the air is saturated and clouds can form. Cloud Formation.

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Chapter 23 Section 2 Review Page 586 #‘s 1-6 “Clouds and Fog”

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  1. Chapter 23 Section 2 Review Page 586 #‘s 1-6“Clouds and Fog”

  2. 1. Describe the conditions that are necessary for clouds to form. • You need particulates (dust, pollen, etc.) with water vapor and a temperature below the dew point so that the air is saturated and clouds can form.

  3. Cloud Formation

  4. 2. Explain the four processes of cooling that can lead to cloud formation. • Adiabatic cooling: rising and expansion of an air mass • Mixing: mixing of moist air with another air mass of different temperature • Lifting: forced upward movement of air as it moves up a mountain • Advective cooling: an air mass moving over a cooler surface (land or water)

  5. Adiabatic cooling Liftingair masses

  6. Advective cooling in Draper/Sandy

  7. 3. Compare cirrus, cumulus, and stratus clouds. • Cirrus: wispy, high-altitude clouds composed of ice crystals • Cumulus: puffy, vertically growing clouds, usually associated with fair weather • Stratus: layered and form when warm moist air lies above a layer of cooler air

  8. 4. Compare clouds with fog. • Both form as a result of condensation of water vapor in the air • Fog occurs near the surface of Earth • Clouds occur at higher altitudes

  9. CLOUDS FOG

  10. 5. Describe four ways in which fog can form. • Radiation fog occurs as a result of the nightly cooling when a layer of air is in contact with the cold ground • Advection fog occurs when warm, moist air moves across a cold surface, like when moist ocean air flows over land

  11. Radiation Fog

  12. Advection Fog

  13. 5. Describe four ways in which fog can form. (continued) • Upland fog forms when moist air rises over a slope • Steam fog forms where cool air moves over a warm body of water

  14. Upland fog Steam fog over California beach

  15. 6. Explain why air expands when it rises. • When air rises it enters an area of lower pressure. The lower air pressure allows the air molecules to move farther apart (expand).

  16. Rising, Expanding Air

  17. The End…..(what is it?) An Aurora…..

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