Homework Help: 7th grade Science

Posted by Daniella on Saturday, September 24, 2011 at 6:20pm.

Early Earth was constantly being bombarded by meteorites, comets, and asteroids. Was early Earth an open system or a closed system? Explain your answer.

7th grade Science - SraJMcGin, Saturday, September 24, 2011 at 8:32pm
Try some of the following links for information:

http://www.google.com/search?q=was+early+Earth+an+open+or+closed+system+%26+why&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a

Sra

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