Questions with the keyword 'oxygen'
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Why does our planet have oxygen but other planets and moons like Jupiter, the Moon, Saturn etc. not have oxygen.
by rebecca.leyland to Huma, Jack, Lucy, Miranda, Peter
Comments: (No comments so far )
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Why does the earth have oxygen and all the other planets do not?
by Lucy2004simmons to Peter
Comments: (No comments so far )
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why do trees breath in carbondioxide and breathe out oxygen
by Bubble789 and 1 other. to Lucy, Huma, Jack, Miranda, Peter
Comments: (So far, one comment )