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level: Module #2

Questions and Answers List

level questions: Module #2

QuestionAnswer
HumidityThe moisture content of air.
Absolute HumidityThe mass of water vapour contained in a certain volume of air.
Relative HumidityThe ratio of the mass of water vapour in the air at a given temperature to the maximum mass of water vapour the air could hold at that temperature, expressed as a percentage.
Greenhouse EffectThe process by which certain gases (principally water vapour, carbon dioxide, and methane) trap heat that radiates from earth.
Parts Per MillionThe number of molecules (or atoms) of a substance in a mixture for every one million molecules (or atoms) in that mixture.