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2nd P. Science Quiz
Question | Answer |
---|---|
Humidity | The moisture content of air |
Absolute humidity | The mass of water vapor contained in a certain volume of air |
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 |
Greenhouse effect | The process by which certain gases(principally water vapor, CO2, and methane) trap heat that radiates from the earth |
% nitrogen in dry air | 78% |
% oxygen in dry air | 21% |
% other in dry air | 1% |
Parts per million | The number of molecules(or atoms)of a substance in a mixture for every 1 million molecules in that mixture |
% nitrogen in exhaled air | 75% |
% oxygen in exhaled air | 16% |
% CO2 in exhaled air | 4% |
% water vapor in exhaled air | 4% |
% other in exhaled air | 1% |