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11 Cards in this Set
- Front
- Back
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humidity
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The moisture content of air.
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heat index
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A combination of temperature and humidity.
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absolute humidity
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The mass of water vapor contained in a certain volume of air.
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relative humidity
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A quantity expressing humidity as a percentage of the maximum absolute humidity for that particular temperature.
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greenhouse effect
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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.
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global warming
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If the concentration of carbon dioxide (and the other greenhouse gases) were to increase too much, the earth would get too warm.
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ozone
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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.
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parts per million
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The number of molecules (or atoms) of a substance in a mixture for every one million molecules (atoms) in that mixture.
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catalytic converters
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A device which converts more than 95% of the carbon monoxide produced by automobiles into carbon dioxide.
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scrubbers
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Devices installed in smokestacks of certain power plants and heavy industry designed to reduce air pollution.
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cost/benefit
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Asking if the benefit achieved by a certain action is worth the cost involved.
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