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14 terms

Science vocabulary week 4

vocab. for module 3 test. i'm just doing the ones in the study guide, guys, because there are so many and i think this is all we'll have to know.
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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)
mesosphere
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 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