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2.2 Billion years ago Photosynthetic bacteria in the ocean began churning out oxygen as a result of photosynthesis. Then, oxygen gas started accumulating in the atmosphere.
Wiki User
∙ 15y ago
Wiki User
∙ 15y agoThe Big Bang.
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Where does the free oxygen in Earths atmosphere come from?
The free oxygen bubbled up from the oceans.
The primitive earth's atmosphere did not contain water vapor free nitrogen free hydrogen free oxygen inert gases?
free oxygen
The primitive earth's atmosphere did not contain?
free oxygen
What is the major source of free oxygen in atmosphere?
Green Plants
Scientists can determine if oxygen existed in earths Archean atmosphere by?
The Archean atmosphere is believed to have been free of free oxygen. Banded iron formations did not occur till near the end of the Archean period.
Where does the free oxygen in Earths atmosphere come from?
The free oxygen bubbled up from the oceans.
Where does the free oxygen it the atmosphere come form today?
It is produced by the photosynthesis of plant life.
The primitive earth's atmosphere did not contain?
free oxygen
The primative earths atmosphere did not contain?
Free oxygen
The primitive earth's atmosphere did not contain water vapor free nitrogen free hydrogen free oxygen inert gases?
free oxygen
Can you breathe Jupiter's atmosphere?
No. Jupiter's atmosphere is mostly hydrogen and helium with no free oxygen.
How much of the atmosphere of the is free of nitrogen?
32% the of the atmosphere is Argon, Oxygen and Other stuff
Where do the oxygen atoms in the CO2 come from?
The oxygen most often comes from the atmosphere which is 21% oxygen.
What is the major source of free oxygen in atmosphere?
Green Plants
What organisms contributed the most to the shift between an oxygen-free atmosphere to an oxygenated atmosphere?
The 'photosynthtics'
What organisms contributed the most to the shift between an oxygen free atmosphere to an oxygenated atmosphere?
cyanobacteria
What organism contributed the most to the shift between an oxygen-free atmosphere to an oxygenated-atmosphere?
The 'photosynthtics'
