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10 Cards in this Set
- Front
- Back
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What is evaporation in the water cycle?
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The Sun provides the energy for liquid water to become water vapor, an invisible gas.
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What is condensation in the water cycle?
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The warm, moist air rises into cooler parts of the atmosphere, causing the water vapor to form drops of water.
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What is precipitation in the water cycle?
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As more vapor condenses, it forms rain, sleet, or snow that falls back to the ground.
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What is an air mass?
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It is a huge volume of air that is responsible for certain types of weather.
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What is atmosphere?
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It is a mixture of gases that surround Earth, 78 percent nitrogen and 21 percent oxygen.
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What is a front?
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It is a narrow region between two air masses that are warm or cold.
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What is the mesosphere?
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It lies above the stratosphere and is the coldest layer of Earth's atmosphere.
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What is the stratosphere?
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The cold, dry layer of Earth's atmosphere above the troposphere,contains most of the ozone that protects against radiation from the sun.
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What is the thermosphere?
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It is the very thin layer of Earth's atmosphere, first to be struck by sunlight.
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What is the troposphere?
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It is the layer of Earth's atmosphere closest to Earth's surface and contains about three-fourths of the atmosphere's gases.
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