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Ch. 16 Vocabulary. Cloud. a collection of small water droplets or ice crystals suspended in the air, which forms when the air is cooled and condensation occurs. Humidity. amount of water vapor in the air. Precipitation.
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Cloud a collection of small water droplets or ice crystals suspended in the air, which forms when the air is cooled and condensation occurs
Humidity amount of water vapor in the air
Precipitation any form of water that falls to the Earth’s surface from the clouds
Weather short-term state of the atmosphere, including temperature, humidity, precipitation, wind, and visibility
Condensation the change of state from a gas to a liquid
Relative humidity ratio of the amount of water vapor in the air to the amount of water vapor needed to reach saturation at a given temperature
Thunderstorm usually brief, heavy storm that consists of rain, strong winds, lightening, and thunder
Air masses large body of air where temperature and moisture content are constant throughout
Front boundary between air masse of different densities and usually different temperatures
Anticyclone the rotation of air around a high-pressure center in the direction opposite to Earth’s rotation
Lightning electric discharge that takes place between 2 oppositely charges surfaces, such as between a cloud and the ground, between 2 clouds, or between 2 parts of the same cloud
Thunder sound cased by the rapid expansion of air along an electrical strike
Tornado destructive, rotating column if air that has very high wind speeds, is visible as a funnel-shaped cloud, and touches the ground
Anemometer instrument used to measure wind speed
Thermometer instrument that measures and indicates temperature
Cyclone an area in the atmosphere that has lower pressure than the surrounding areas and has winds that spiral toward the center
Barometer instrument that measures atmospheric pressure
Hurricane severe storm that develops over tropical oceans and whose strong winds or more than 120 km/h spiral toward the intensely low pressure storm center