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15 Cards in this Set
- Front
- Back
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emissions
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Solid particles and gases released into the air from a smokestack or motor vehicle.
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atmosphere
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The mixture of gases that surrounds Earth. The outermost of the 4 spheres into which scientists divide Earth.
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altitude
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Elevation above sea level.
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barometer
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An instrument used to measure changes in air pressure.
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acid rain
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Rain that is more acidic than normal, caused by the release of molecules of sulfur dioxide and nitrogen oxide into the air.
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ozone
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A form of oxygen that has 3 oxygen atoms in each molecule instead of the ususal two; a toxic form of oxygen.
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water vapor
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The invisible, gaseous form of water.
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global warming
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A gradual increase in the temperature of Earth's atmosphere.
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exosphere
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The outer layer of the thermosphere, extending outward into space.
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greenhouse effect
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The process by which heat is trapped in the atmosphere by water vapor, carbon dioxide, methane, and other gases that form a "blanket" around Earth.
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chlorofluorocarbon
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Chlorine compounds formerly used in air conditioners, refrigerators, and spray cans; also called CFCs.
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stratosphere
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The second-lowest layer of Earth's atmosphere; the ozone layer located in the upper stratosphere.
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thermosphere
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The outer most layer of Earth's atmosphere.
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ionosphere
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The lower part of the thermosphere, where electrically charged particles called ions are found.
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troposhpere
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The lowest layer of Earth's atmosphere, where weather occurs.
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