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26-02-2016
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About how much of Earth’s atmosphere is oxygen?

35%
21%
50%
78%

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Аноним Аноним

26-02-2016

Nitrogen takes up 78% of the atmosphere, Oxygen takes up 21% of the atmosphere, and the rest is other gases like Methane, and Carbon Dioxide.

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Аноним Аноним

26-02-2016

earth's atmosphere is made up of 21% of oxygen

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