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ELL Earth Sci 23.1

Characteristics of the Atmosphere

TermDefinition
weather the general condition of the atmosphere at a particular time and place
climate the general weather conditions of an area over many years
ozone a molecule composed of 3 oxygen atoms which absorbs ultraviolet rays of the Sun
Chlorfluorocarbons (CFCs) compounds used in refrigeration and aerosols that break down ozone
atmospheric pressure the ratio of the force of the air to the area of surface on which it presses
barometer instrument used for measuring air pressure
anemometer instrument used for measuring wind speed
thermometer instrument used for measuring air temperature
troposphere layer of the atmosphere closest to the Earth's surface where almost all weather occurs
stratosphere layer of the atmosphere above the tropopause up to an altitude of 50 km which contains most of the ozone in the atmosphere
mesosphere layer of the atmosphere above the stratopause up to an altitude of 80 km which is the coldest of all layers
thermosphere layer of the atmosphere above the mesopause which is the hottest of all layers with temperatures reaching up to 2000 degrees C
ionosphere region of lower thermosphere (80-500 km), where gases ionize and reflect radio waves back to Earth
exosphere outer region of the thermosphere that merges into the vacuum of interplanetary space
air pollution any substance in the atmosphere that is harmful to people, animals, plants or property
temperature inversion a condition where warm air traps polluted cold air beneath it forming smog
Created by: Jesse Wayland
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