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Module 3 Vocab.
vocabulary for module 3
7
Science
9th Grade
10/17/2011

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Term
atmosphere
Definition
The mass of air surrounding a planet
Term
Barometer
Definition
An instrument used to measure atmospheric pressure.
Term
Homosphere
Definition
The lower layer of earth's atmosphere, which exists from ground level to roughly 80 kilometers (50 mles) above sea level.
Term
Heterosphere
Definition
The upper layer of earth's atmosphere, which exists higher than roughly 80 kilometers (50 miles) above sea level.
Term
Jet streams
Definition
Narrow bands of high-speed winds that circle the earth, blowing from west to east
Term
Heat
Definition
Energy that is transferred as a consequence of temperature differences
Term
Temperature
Definition
A measure of the energy of random motion in a substance's molecules
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