Comets: How Big a Threat to Earth?
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- Original Source:Xpeditions
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Description
In this National Geographic News article, read about the potential of a comet impacting Earth. While comets impact Earth much less frequently than do asteroids, they are capable of causing much worse damage. Links to related stories and Web sites are also found on this page.
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Topics and Grades
Grade: 3 to 12
Topics: American Democracy, Geography, Science, History-Social Science, Earth & Space Science
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