AP Environmental Science 9.1-9.2 - Ozone Depletion
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16 Terms
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Thomas Midgley Jr
The General Motors chemist who discovered the first chlorofluorocarbon (CFC) in 1930.
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O3
The layer of ozone gas (________) in the upper stratosphere that screens out harmful ultraviolet radiation from the sun.
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UV
________ light breaks off chlorine molecule (Cl) from the CFC particle.
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Chlorine
________ acts as a catalyst to break down ozone (O3)
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Catalyst
________- promotes a chemical reaction without itself being used up in the reaction.
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Ozone Shield
________: a natural process that filters ultraviolet (UV) radiation before it reaches the lower atmosphere.
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Ozone depletion
______ _________ has been cooling the troposphere.
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Ozone Depleting Chemicals
Chlorofluorocarbons (CFCs), halons, methyl bromide, carbon tetrachloride, methyl chloroform, and hydrogen chloride
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Chlorofluorocarbons
Ozone depleting chemicals comprised of chlorine, fluorine, and carbon.
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Halons
Ozone depleting chemicals found in fire extinguishers
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Methyl Bromide
An ozone depleting chemical that is also a fumigant
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Carbon Tetrachloride
An ozone depleting chemical that is cheap, yet highly toxic
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Methyl Chloroform
An ozone depleting chemical that is found in cleaning solvent for clothes and metals
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Hydrogen Chloride
An ozone depleting chemical that is found in U.S. space shuttles
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Montreal Protocol
A 1987 agreement to cut emission of CFCs by 35% by 2000
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London and Copenhagen
1990 and 1992 agreements to accelerate the phase-out of other key ozone-depleting chemicals