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Precipitation

Precipitation. By Sam Belanger. What is it?. Precipitation is water in solid or liquid form, that falls from the air to the Earth’s surface There are four main types: Snow, Rain, Sleet, and Hail

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Precipitation

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  1. Precipitation By Sam Belanger

  2. What is it? • Precipitation is water in solid or liquid form, that falls from the air to the Earth’s surface • There are four main types: Snow, Rain, Sleet, and Hail • Precipitation reaches the Earth’s surface, when the water vapor droplets in clouds become so heavy they actually fall to the Earth’s surface

  3. Rain • The most common form of precipitation • Consists of liquid water that falls from the clouds to the Earth’s surface • Before a drop of rain falls, it must increase in size about 100 times its normal diameter • The droplet actually starts out smaller than a period you would put at the end of a sentence

  4. Snow • Snow is the most common form of solid precipitation • Forms when temperatures are so cold that water vapor changes directly to a solid • Can fall as individual ice crystals, or combine to form snowflakes • The size of a snowflake depends on how many ice crystals join together

  5. Sleet • Also known as freezing rain • Forms when rain falls through a layer of freezing air • The rain freezes, which produces falling ice • Sometimes does not freeze until contact with the ground, and changes into a layer of ice called glaze

  6. Hail • Solid precipitation that falls as balls or lumps of ice • Usually forms in cumulonimbus clouds, updrafts then carry raindrops to high altitudes in the cloud where they freeze • Another updraft can send the hail up to the cloud, forming another layer of ice on the droplet • If an updraft is strong enough, the droplet can continue to receive many layers of ice • If it gets heavy enough, it will fall to earth and can become very dangerous • Largest recorded-17.5 inches long, 1.67 lbs

  7. Measurement • If you are curious about the amount of rainfall you’ve received, you can use an instrument called a rain gauge to measure the amount of rainfall • A rain gauge consists of a funnel and cylinder, and measures the exact amount of rainfall • Snow is simply measured using a yardstick, and measured by depth and water content

  8. Value • Precipitation has a great impact on Earth • It replenishes water that the Earth needs • Without it, the whole world would simply be an enormous desert • Precipitation also helps farmers grow their crops, and provides a fresh water supply for us to drink

  9. Precipitation Fun Facts • Nevada is the driest state with an average of 9.5 inches of precipitation each year. • Hawaii is the wettest state with an annual average of 63.7 inches • Mt. Baker, Washington received 1,140 inches of snowfall in the 1998-99 season • Buffalo, New York received 39 inches of snowfall in a 24 hour period, costing 5 million dollars for snow removal

  10. Resources • http://www.fondriest.com/science_library-htm/precipitation.htm • My Science Book • http://www.theweatherprediction.com/preciptypes/ • http://allaboutweather.org • http://blogs.eveningsun.com • http://www.infoplease.com/images

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