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18 Cards in this Set
- Front
- Back
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Weather
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The short-term state of the atmosphere including temperature, humidity, precipitation, wind, and visibility.
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Humidity
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The amount of water vapor in the air.
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Relative humidity
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The ratio of the amount of water vapor in the air to the maximum amount of water vapor the air can hold at a set temperature.
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Condensation
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The change of state from a gas to a liquid.
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Cloud
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A collection of small water droplets or ice crystals suspended in the air, which forms when the air is cooled and condensation occurrs.
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Precipitation
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Any form of water that falls to the Earth's surface from the clouds.
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Air mass
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A large body of air where temperature and moisture content are similar throughout.
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Front
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The boundry between air masses of different densities and usually different temperatures.
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Cyclone
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An area in the atmosphere that has lower pressure thanthe surrounding areas and has winds that spiral toward the center.
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Anticyclone
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The rotation of air around a high pressure center in the direction opposite to Earth's rotation.
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Thunderstorm
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A usually brief, heavy storm that consists of rain, strong winds, lightning, and thunder.
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Lightning
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An electric discharge that takes place between two oppositely charged surfaces, such as between a cloud and the ground, between two clouds, or two parts of the same cloud.
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Tornado
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A destructive, rotating column of air that has very high wind speeds, is visible as a funnleshaped cloud, and touches the ground.
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Hurricane
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A severe storm that developes over tropical oceans and whose strong winds of more than 120 km/h spiral in toward the intensely low pressure storm center.
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Thermometer
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An instrument that mesures and indicates temperature.
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Barometer
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An instrument that mesures atmospheric temperature.
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Anemometer
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An instrument used to mesure wind speed.
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Thunder
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The sound caused by the rapid expansion of air along the electrical strike.
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