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14 Cards in this Set
- Front
- Back
Atmosphere |
The mass of air surrounding a planet
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Atmospheric pressure
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The pressure exerted by the atmosphere on all objects within it
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Barometer
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An instrument used to measure atmospheric pressure
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Heterosphere
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The upper layer of earth's atmosphere, which exists higher than roughly 80 kilometers (50 miles) above sea level
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Homosphere
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The lower layer of earth's atmosphere, which exists from ground level to roughly 80 kilometers (50 miles) above sea level
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Troposphere
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The region of the atmosphere that extends from ground level to roughly 11 kilometers (7 miles) above sea level
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Stratosphere
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The region of the atmosphere that spans altitudes of roughly 11 kilometers to 48 kilometers (30 miles)
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Mesosphere
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The region of the atmosphere that spans altitudes of roughly 48 kilometers to 80 kilometers (50 miles)
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Jet streams
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Narrow bands of high-speed winds that circle the earth, blowing from west to east
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Heat
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Energy that is transformed as a consequence of temperature differences
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Temperature
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A measure of the energy of random motion in a substance's molecules
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Thermosphere
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The region of the atmosphere between altitudes of roughly 80 kilometers and 460 kilometers
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Exosphere
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The region of the atmosphere above an altitude of roughly 460 kilometers
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Ionosphere
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The region of the atmosphere between the altitudes of roughly 65 kilometers and 330 kilometers, where the gases are ionized
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