Physical Science: Percipitation

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Questions for Review: 1. Explain how dew, frozen dew, and visible frost each form? a. Dew forms when the surface of the earth cools very quickly on clear, calm nights. The air just above the surface is cooled to its dew point and condensation occurs on plants and objects. b. Frozen dew is when liquid dew changes into tiny beads of ice. The change occurs after dew formation and then the temperature falls below freezing. c. Frost is frozen condensation at the earth’s surface. Similar process to dew formation but at below freezing temperatures. Temperature hits dew point and water vapor condenses directly as white ice crystals. 11. Clouds are most generally classified by height above the earth’s surface. List the major height categories and the cloud types associated with each. a. High Clouds: 5,000-13,000m and include Cirrus, Cirrocumulus and Cirrostratus. b. Middle Clouds: 2,000 – 7,000m and include Altostratus, Altocumulus c. Low Clouds: Surface – 2,000m and include Stratus, Stratocumulus and Nimbostratus. d. Clouds with vertical development: Surface to 13,000m and include Cumulus and Cumulus nimbus. 14. How can you distinguish altostratus from cirrostratus? a. An altostratus cloud usually covers the whole sky and has a gray or blue-gray appearance. The sun or moon may shine through an altostratus cloud, but will appear watery or fuzzy. An altostratus cloud usually forms ahead of storms with continuous rain or snow. b. Cirrostratus clouds belong to the High Cloud group. They are sheet like thin clouds that usually cover the entire sky. The sun or moon can shine through cirrostratus clouds. Sometimes, the sun or moon will appear to have a halo around it when in the presence of cirrostratus. The ice crystals from the cloud refracts the light from the sun or moon, creating a halo. 17. How do geostationary satellites differ from

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