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Oxygen makes up about _____ percent of Earth's atmosphere. A. 100% B. 78% C. 21% D. 1%
Oxygen makes up about 21 percent of Earth's atmosphere.
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Expert answered|andrewpallarca|Points 18772|
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Asked 1/22/2013 10:08:19 AM
Updated 6/8/2014 5:12:32 AM
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This answer has been confirmed as correct and helpful.
Edited by Janet17 [5/28/2014 1:30:40 PM], Confirmed by Janet17 [5/28/2014 1:30:46 PM], Edited by jeifunk [5/28/2014 1:36:02 PM]
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The oxygen makes up about 21 % of the earth's atmosphere.Then 78% of nitrogen and the remaining percent compose of other component like carbon dioxide ,helium, and others.
Added 6/8/2014 5:12:29 AM
This answer has been flagged as incorrect.
Flagged by andrewpallarca [6/8/2014 11:05:14 AM]
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The oxygen makes up about 21 % of the earth's atmosphere.Then 78% of nitrogen and the remaining percent compose of other component like carbon dioxide ,helium, and others.
Added 6/8/2014 5:12:32 AM
Flagged by andrewpallarca [6/8/2014 11:05:15 AM]
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