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TeachMeFinance.com - explain precipitation precipitation The term 'precipitation' as it applies to the area of Earth observation can be defined as 'Moisture that falls from clouds. Although clouds appear to float in the sky, they are always falling, their water droplets slowly being pulled down by gravity. Because their water droplets are so small and light, it can take 21 days to fall 1,000 feet and wind currents can easily interrupt their descent. Liquid water falls as rain or drizzle. All raindrops form around particles of salt or dust. (Some of this dust comes from tiny meteorites and even the tails of comets.) Water or ice droplets stick to these particles, then the drops attract more water and continue getting bigger until they are large enough to fall out of the cloud. Drizzle drops are smaller than raindrops. In many clouds, raindrops actually begin as tiny ice crystals that form when part or all of a cloud is below freezing. As the ice crystals fall inside the cloud, they may collide with water droplets that freeze onto them. The ice crystals continue to grow larger, until large enough to fall from the cloud. They pass through warm air, melt, and fall as raindrops. When ice crystals move within a very cold cloud (10 degrees F and -40 degrees F) and enough water droplets freeze onto the ice crystals, snow will fall from the cloud. If the surface temperature is colder than 32 degrees F, the flakes will land as snow'. The term 'precipitation' as it applies to the area of reclamation can be defined as ' The total measurable amount of water received in the form of snow, rain, drizzle, hail, and sleet. The process by which atmospheric moisture falls onto a land or water surface as rain, snow, hail, or other forms of moisture'. The term 'precipitation' as it applies to the area of basic science can be defined as 'any form of water, such as rain, snow, sleet, or hail, which falls to the Earth's surface'. The term 'precipitation' as it applies to the area of water can be defined as 'rain, snow, hail, sleet, dew, and frost'. Previous 5 Terms: Precambrian Precast dam PRECD Precession Precipitable Water Next 5 Terms: Precipitation Attenuation Precipitation Mode Precipitation Processing System precipitinogenic Precision About the author Mark McCracken Author: Mark McCracken is a corporate trainer and author living in Higashi Osaka, Japan. He is the author of thousands of online articles as well as the Business English textbook, "25 Business Skills in English". Copyright © 2005-2011 by Mark McCracken, All Rights Reserved. TeachMeFinance.com is an informational website, and should not be used as a substitute for professional medical, legal or financial advice. Information presented at TeachMeFinance.com is provided on an "AS-IS" basis. Please read the disclaimer for details.