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Gerardo Glover

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Q: What is the major source of free oxygen in atmosphere?
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What is hypothesized to be the early source of free oxygen in Earth's atmosphere?

cyanobacteria


Hypothesized to be the early source of free oxygen in Earth's atmosphere?

photosynthesis by cyanobacteria


What is inferred to be the main source of the free oxygen that first entered earth's atmosphere?

oxygen producing organisms


Why was oxygen absent from earth's early atmosphere?

Oxygen is an extremely chemically active element, which is why things can burn in our current atmosphere. In the early Earth, all the oxygen had reacted with other chemicals in the environment, so that there was no free oxygen. Only later, when photosynthesis was used by green plants, was there a source of free oxygen.


Where does the free oxygen in Earths atmosphere come from?

The free oxygen bubbled up from the oceans.


How does the light reaction of photosynthesis affect the earths supply of oxygen?

Photosynthesis is the source of virtually all the free oxygen in the earth's atmosphere.


What effect does photosynthesis have on the amount of oxygen in the atmosphere?

Photosynthesis is the source of virtually all the free oxygen in the earth's atmosphere.


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