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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 and cool regions on the surface of the sun.
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greenhouse effect
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Sun's energy reaches Earth. Earth's surface is heated while some heat is radiated into space. Some radiated heat is absorbed by gases in the atmosphere and then radiated back toward Earth.
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fossil fuels
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Energy-rich substances formed from the remains of organisms.
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global warming
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The gradual increase in the temperature of Earth's atmosphere.
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