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11 Cards in this Set

  • Front
  • Back
The moisture content of air.
heat index
A combination of temperature and humidity.
absolute humidity
The mass of water vapor contained in a certain volume of air.
relative humidity
A quantity expressing humidity as a percentage of the maximum absolute humidity for that particular temperature.
greenhouse effect
The process by which certain gases (principally water vapor, carbon dioxide, and methane) trap heat that would otherwise escape the earth and radiate into space.
global warming
If the concentration of carbon dioxide (and the other greenhouse gases) were to increase too much, the earth would get too warm.
A molecule, composed of three oxygen atoms, which blocks/filters the ultraviolet light from the sun. It is a pollutant at ground level, but necessary high up in the air.
parts per million
The number of molecules (or atoms) of a substance in a mixture for every one million molecules (atoms) in that mixture.
catalytic converters
A device which converts more than 95% of the carbon monoxide produced by automobiles into carbon dioxide.
Devices installed in smokestacks of certain power plants and heavy industry designed to reduce air pollution.
Asking if the benefit achieved by a certain action is worth the cost involved.