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Last Post 10/17/2012 11:46 AM by  Terry Kucera
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10/17/2012 10:01 AM

    Is the Earth the only planet with oxygen?

    Terry Kucera

    Basic Member

    Basic Member

    10/17/2012 11:46 AM


    Earth's atmosphere is 20% oxygen, mostly in the form of the molecule O2. It is the only planet with anywhere near that amount. Mars's atmosphere is only 0.13% oxygen and it has a much thinner atmosphere than Earth's to boot! Other atmospheres have oxygen in other molecules. For instance, the main gas making up the atmospheres of Venus and Mars is carbon dioxide (CO2) but we can't breath that. That means Earth is the only place in the solar system where a human can breath (and live) without a whole lot of equipment.


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