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PhysSciMod1-4Qua1

Quarterly Vocab Test 1

QuestionAnswer
Atom The smallest chemical unit of matter
Molecule Two or more atoms linked together to make a substance with unique properties.
Concentration The quantity of a substance within a certain volume.
Absolute humidity The mass of water vapor contained in a certain volume of air.
Greenhouse effect The process by which certain gases (principally water vapor, carbon dioxide, and methane) trap heat that radiates from earth.
Humidity The moisture content of the air.
Parts per million The number of molecules (or atoms) of a substance in a mixture for every one million molecules (or atoms) in that mixture.
Relative humidity The ratio of the mass of water vapor in the air at a given temperature to the maximum mass of water vapor the air could hold at that temperature expressed as a percentage
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
Exosphere The region of the atmosphere above an altitude of roughly 460 kilometers
Created by: 1035114107
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