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15 Cards in this Set

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