Apologia Exploring Creation with Physical Science Module 2
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Humidity | The moisture content of air. |
Absolute Humidity | The mass of water vapour contained in a certain volume of air. |
Relative Humidity | The 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 Effect | The process by which certain gases (principally water vapour, carbon dioxide, and methane) trap heat that radiates from earth. |
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. |