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Autumn Science 6.7

Earth's Atmosphere

TermDefinition
Air mass A huge body of air that has similar temperature, pressure, humidity throughout.
Air pressure A force this is the result of the weight of a column of air pushing down on an area.
Altitude Elevation above sea level.
Atmosphere The mixture of gases that surround Earth.
Condensation The process by which a gas, such as water vapor, changes to a liquid such as water.
Density The amount of mass in a given space.
Dew point The temperature at which condensation begins.
Evaporation The process by which molecules at the surface of a liquid, such as water, absorb enough energy to change into a gaseous state, such as water vapor.
Front The area where air masses meet and do not mix.
Humidity A measure of amount of water vapor in the air.
Hurricane A tropical storm that has wind of 119 kilometres per hour or higher; typically about 6000 kilometres across.
Mass A measure of how much matter is in a object.
Precipitation Forms when water such as rain, thunder, and lightning.
Thunderstorm A small, intense weather system that produces winds, rain, thunder, and lightning.
Wind The horizontal movement of air from an area of high pressure to and area of lower pressure
Created by: 1531528
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