feb.26 2013
Help!
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| what are the two conditions required to form a thunderstorm? | a strong updraft; unstable air
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| what term refers to a thunderstorm with a single, giant, rotating updraft? | supercell
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| what is a short-lived, bright flash of light produced by an abrupt discharge of electricity through the air? | lightning
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| what phase of a lightning bolt is seen as a brilliant flash of light? | return srtoke
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| what is a tornado? | a narrow funnel of powerful, rapidly whirling wind that stretches from a cloud to the ground
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| what is a tornado that forms over water called? | waterspout
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| the arrival of precipitatin at the earths surface marks the beginning of what stage? | mature stage
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| what stage usually lasts for 10-15 minutes and forms a billowing, rapidly growing cumulus cloud; inside the upper levels of cloud, ice crystals & supercooled water droplets begin to form. | cumulus stage
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| what are very strong, localized downdrafts | downbursts
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| smallest, most intense downbursts are called what? | microbursts
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| what is a squall line? | a long line of advancing thunderstorms, usually moving ahead of a cold front
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| most powerful type of thunderstorm;a fierce, single-updraft giant | supercell
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| another word for an updraft system in a thunderstorm? | cell
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