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6 Cards in this Set
- Front
- Back
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ice age
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a glacial episode during a past geological period
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aerosol
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a substance enclosed under pressure and able to be released as a fine spray, typically by means of a propellant gas.
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sunspot
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a spot or patch appearing from time to time on the sun's surface, appearing dark by contrast with its surroundings.
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greenhouse gas
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a glass building in which plants are grown that need protection from cold weather.
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fossil fuel
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a natural fuel such as coal or gas, formed in the geological past from the remains of living organisms.
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global warming
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gradual increase in the overall temperature of the earth's atmosphere generally attributed to the greenhouse effect
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