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Chapter 15 Key Terms

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Across
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The outermost layer of Earth's atmosphere
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Has an airtight metal chamber
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The state of the atmosphere at a place and time
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The layer of the atmosphere that we live in
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The distance above sea level
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The brown haze that develops in sunny cities
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A toxic gas formed from oxygen by electrical discharges
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Harmful substances in the air, water, or soil
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Water in the form of gas
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The lower layer of the thermosphere
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The force pushing on an area or surface
Down
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Consists of a glass tube open at the bottom end and partially filled with mercury
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The amount of mass in a given volume of air
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Extends from the top of the troposphere to about 50 km above Earth's surface
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The result of the weight of a column of air pushing down on an area
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The envelope of gases surrounding the Earth or another plant
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Rain that contains more acid than normal
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Begins 50 km above Earth's surface and ends at an altitude of 80 km
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The outer portion of the thermosphere
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An instrument that is used to measure air pressure