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Earth Science Gr7

Chaapter 12

TermDefinition
atmosphere a thin layer of gases surrounding Earth
water vapor water in its gaseous form
troposphere the atmospheric layer closest to Earth's surface
stratosphere the atmospheric layer directly above the troposphere
ozone layer the area of the stratosphere with a high concentration of ozone
ionosphere a region within the mesosphere and thermosphere containing ions
radiation energy carried by an electromagnetic wave
conduction the transfer of thermal energy due to collisions between particles
convection the circulation of particles within a material caused by differences in thermal energy and density
stability whether circulating air motions will be strong or weak
temperature inversion a temperature increase as altitude increases in the troposphere
wind the movement of air from areas of high pressure to areas of low pressure
trade winds steady winds that flow from east to west between 30*N latitude and 30*S latitude
westerlies steady winds that flow from west to east between latitudes 30*N and 60*N and 30*S and 60*S
polar easterlies cold winds that blow from the east to the west near the North Pole and South Pole
jet stream a narrow band of high winds located near the top of the troposphere
sea breeze a wind that blows from the sea to the land due to local temperature and pressure differences
land breeze a wind that blows from the land to the sea due to local temperature and pressure differences
air pollution the contamination of air by harmful substances including gases and smoke
acid precipitation precipitation that has a lower pH than that of normal rainwater
photochemical smog air pollution that forms from the interaction between chemicals in the air and sunlight
particulate matter the mix of both solid and liquid particles in the air
Created by: carriel
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