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The Atmosphere

Apologia Physical Science Module 3 Vocabulary

QuestionAnswer
Atmosphere The mass of air surrounding a planet
Atmospheric pressure The pressure exerted by the atmosphere on all objects within it
Barometer An instrument used to measure atmospheric pressure
Homosphere The lower layer of earth's atmosphere, which exists from ground level to roughly 80 kilometers (50 miles) above sea level
Heterosphere The upper layer of earth's atmosphere, which exists higher than roughly 80 kilometers (50 miles) above sea level
Troposphere The region of the atmosphere that extends from ground level to roughly 11 kilometers (7 miles) above sea level
Stratosphere The region of the atmosphere that spans altitudes of roughly 11 kilometers to 48 kilometers (30 miles)
Mesophere The region of the atmosphere that spans altitudes of roughly 48 kilometers to 80 kilometers (50 miles)
Jet streams Narrow bands of high speed winds that circle the earth, blowing from west to east
Heat Energy that is transferred as a consequence of temperature differences
Temperature A measure of the energy of random motion in a substance's molecules
Thermosphere The region of atmosphere between altitudes of roughly 80 kilometers and 460 kilometers
Exosphere The region of the atmosphere above an altitude of roughly 460 kilometers
Ionosphere The region of the atmosphere between the altitudes of roughly 64 kilometers and 330 kilometers, where the gases are ionized
Created by: mrpicard on 2008-09-30



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