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6 Cards in this Set
- Front
- Back
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Ice Age
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a period of glacial advance
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Aerosols
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solid particles or liquid drops in gas
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Sunspots
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dark, cooler regions on the surface of the sun
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Greenhouse Effect
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the trapping of heat near a planet's surface by certain gases in the planet's atmosphere
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Fossil Fuels
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coal, oil, or natural gas that forms over millions of years from the remains of ancient organisms in an ecosystem; burned to release energy
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Global Warming
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a gradual increase in the average temperature of the atmosphere , thought to be caused by an increase in greenhouse gases from human activities
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