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11 Cards in this Set

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Cirrus Clouds
Thin, wispy clouds that form high in the atmosphere as their water vapor freezes into ice crystals.
Cumulus
Fluffy, clouds that develop in towering shapes like cotton candy and signal fair weather.
Cumulonimbus
A dense and vertically developed cloud that produces thunderstorms.
Anemometer
A weather instrument that measures the wind speed.
Stratus
Low-lying, gray and sheetlike clouds that often produce drizzle.
Thermometer
The instrument that measures temperature.
hygrometer
An instrument that measures the water vapor content of air or the humidity.
dew point
The temperature at which water starts to form out of a particular air mass.
Barometer
An instrument that measures air pressure.
high pressure system
A whirling mass of cool, dry air that generally brings fair weather and light winds.
low pressure system
A whirling mass of warm, moist air that generally brings stormy weather with strong winds.