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23 Cards in this Set
- Front
- Back
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What greenhouse gases are found naturally in the atmosphere?
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Water vapour (H2O) and carbon dioxide (CO2)
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How much have global temperatures increased in the last century
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0.5 degrees celcius
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____ frequency in, _____ frequency out
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high, low
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Global warming is clssified as?
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the gradual increase in planetwide temperatures
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What is the Greenhouse effect?
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The trapping of heat in the atmosphere.
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What are the major Greenhouse gases introduced into the evniornment?
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methane (CH4), water vapour (H2O), carbon dioxide (CO2), dinitrogen monoxide (N2O), Ozone (O3) and chlorfluorocarbons (CFCs).
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Main source of O3?
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Photochemical smog
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What effect has global warming had on sea levels in the last century?
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a 15-20 cm worldwide rise in sea levels, resulting from the melting of glaciers and the physical expansion of ocean water (caused by warmer temperatures).
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How do Greenhouse gases act similarly to glass or plastic on a greenhouse?
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They act as a one way filter.
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How much more effective than carbon dioxide is methane in its ability to trap infrared radiation?
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30 times
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What would the earth be like without the greenhouse effect?
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much colder
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What is the main source for H2O(g)?
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evaporation from bodies of water; product of hydrocarbon combustion
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What is the main source for CO2(g)?
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Combustion of fossil fuels, forest fires, decay of plants and animals
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What is the % volume of CH4?
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1.7 x 10^(-4)
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Atmospheric life / years of N2O
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120-150
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What is the contribution to global warming of O3?
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12%
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What is the relative effectiveness of CFCs?
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10 000 - 25 000
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What is the % volume of CFCs?
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2 x 10^(-8)
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What is the relative effectiveness of H2O?
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0.1
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What is the relative effectiveness of CO2?
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1
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Atmospheric life / years of CH4
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7 - 10
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Atmospheric life / years of CO2
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200 - 500
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Atmospheric life / years of CFCs
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80
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