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Science Module 3

Exploring Creation with Physical Science

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 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 11 kilometers to 48 kilometers (30 miles).
Mesosphere The region of the atmosphere that spans altitudes of 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.
Temperature gradient Term often used to describe the steady drop in temperature (in the Troposphere) as altitude increases.
Thermosphere The region of the 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 65 kilometers and 330 kilometers where the gases are ionized.
Created by: clynnb on 2008-10-07



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