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joewalcott24 joewalcott24
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7 years ago

Earths early atmosphere was similar to the present day atmosphere, composed mostly of oxygen and nitrogen.
  a. True
  b. False

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leg17leg17
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joewalcott24 Author
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7 years ago
Smart ... Thanks!
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Yesterday
Helped a lot
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2 hours ago
this is exactly what I needed
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