Chapter 7 Lesson 2: Clouds and Precipitation

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Last updated 7:31 AM on 9/8/26
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26 Terms

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water vapor
Water in its invisible gas form, found in the air around us.
Water in its invisible gas form, found in the air around us.
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condensation
The change of water vapor into liquid water when it cools.
The change of water vapor into liquid water when it cools.
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cloud
A visible collection of tiny water droplets or ice crystals in the air.
A visible collection of tiny water droplets or ice crystals in the air.
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cirrus clouds
Thin, wispy clouds made of ice crystals high in the atmosphere.
Thin, wispy clouds made of ice crystals high in the atmosphere.
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cumulus clouds
Puffy clouds with rounded tops and fairly flat bases.
Puffy clouds with rounded tops and fairly flat bases.
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stratus clouds
Low clouds that spread across the sky in broad, flat layers.
Low clouds that spread across the sky in broad, flat layers.
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fog
A cloud near the ground that reduces how far you can see.
A cloud near the ground that reduces how far you can see.
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precipitation
Water that falls from clouds to Earth's surface as liquid drops or solid particles.
Water that falls from clouds to Earth's surface as liquid drops or solid particles.
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rain
Liquid precipitation that falls from clouds as water drops.
Liquid precipitation that falls from clouds as water drops.
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snow
Solid precipitation made of ice crystals that form directly from water vapor.
Solid precipitation made of ice crystals that form directly from water vapor.
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sleet
Small ice pellets formed when falling raindrops freeze before reaching the ground.
Small ice pellets formed when falling raindrops freeze before reaching the ground.
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hail
Balls or lumps of ice that grow inside thunderstorm clouds.
Balls or lumps of ice that grow inside thunderstorm clouds.
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rain gauge
A container with a marked scale used to measure rainfall depth.
A container with a marked scale used to measure rainfall depth.
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air mass
A large body of air with similar temperature and humidity across an area.
A large body of air with similar temperature and humidity across an area.
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source region
The area where an air mass forms and gains its temperature and moisture characteristics.
The area where an air mass forms and gains its temperature and moisture characteristics.
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front
The boundary where two air masses with different characteristics meet.
The boundary where two air masses with different characteristics meet.
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cold front
A boundary where advancing cold air pushes beneath warmer air.
A boundary where advancing cold air pushes beneath warmer air.
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warm front
A boundary where advancing warm air rises over colder air.
A boundary where advancing warm air rises over colder air.
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stationary front
A boundary between two different air masses that stays in nearly the same place.
A boundary between two different air masses that stays in nearly the same place.
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jet stream
A narrow band of strong winds high in the atmosphere.
A narrow band of strong winds high in the atmosphere.
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low-pressure system
A weather system with lower air pressure at its center, often bringing clouds and precipitation.
A weather system with lower air pressure at its center, often bringing clouds and precipitation.
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high-pressure system
A weather system with higher air pressure at its center, often bringing clear, dry weather.
A weather system with higher air pressure at its center, often bringing clear, dry weather.
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isobar
A line on a weather map connecting places with equal air pressure.
A line on a weather map connecting places with equal air pressure.
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weather map
A map showing weather conditions in an area at a particular time.
A map showing weather conditions in an area at a particular time.
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meteorologist
A scientist who studies the atmosphere and weather and makes weather predictions.
A scientist who studies the atmosphere and weather and makes weather predictions.
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forecast
A prediction of future weather based on measurements and observations.
A prediction of future weather based on measurements and observations.