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Home Q & A Board Science-Related Homework Help Geography and Earth Sciences
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Wrogue Wrogue
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9 years ago
For about the last ________ years, Earth has had about the same balance of chemical components that now persists.
A) 10,000
B) 100,000
C) 1 million
D) 500 million
E) 1 billion
Textbook 
McKnight's Physical Geography: A Landscape Appreciation

McKnight's Physical Geography: A Landscape Appreciation


Edition: 12th
Authors:
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GeoExpGeoExp
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9 years ago
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Wrogue Author
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#2
9 years ago
Your assistance has been above and beyond my expectations! So glad to have joined this forum. Thanks, and will mark as this thread officially solved Smiling Face with Open Mouth
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#3
9 years ago
Always nice to know I've helped.
Good luck with the rest of them.

- GeoExp
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