Term Definition
Atmosphere a mixture of gases that surrounds a planet or moon
Stratosphere the layer of the atmosphere that is above the troposphere and in which temperature increases as altitude increases
Troposphere the lower layer of the atmosphere, in which temperature decreases at a constant rate as altitude increases
Thermosphere the uppermost layer of the atmosphere, in which temperature increases as altitude increases
Air pressure the measure of the force with which air molecules push on a surface
Radiation the transfer of energy as electromagnetic waves
Convection the transfer of thermal energy by the circulation or movement of a liquid or gas
Global warming a gradual increase in average global temperature
Greenhouse effect the warming of the surface and lower atmosphere of earth that occurs when water vapor, carbon dioxide, and other gases absorb and reradiate thermal energy
Wind the movement of wind caused by the differences in air pressure
Coriolis effect the apparent curving of the path of a moving object from an otherwise straight path due to the Earth’s rotation
Westerlies prevailing winds that blow from west to east between 30 degrees and 60 degrees latitude in both hemispheres
Trade winds prevailing winds that blow northeast from 30 degrees north latitude to he equator and that blow southeast from 30 degrees south latitude to the equator
Polar easterlies prevailing winds that blow from east to west between 60 degrees and 90 degrees latitude in both hemispheres
Jet stream a narrow belt of strong winds that blow in the upper troposphere
Air pollution the contamination of the atmosphere by introduction of pollutants from humans natural resources
Acid precipitation rain, sleet, or snow that contains a high concentration of acids




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