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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.
Rubye Mante
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Was there oxygen in the early earths atmosphere?
yes
Which gas was absent in the Early Archean Era?
Oxygen was generally absent from the atmosphere during the Early Archean Era.
Earths early atmosphere formed during the early Archean era which gas was generally absent from the atmosphere at that time?
Oxygen Please study this, & don't forget it so you don't have to keep looking up answers .
What gas was not part of early earths atmosphere?
oxygen
What gas was lacking from earths early atmosphere in the early precambrian?
oxygen
Was the earths early atmosphere made up of mostly oxygen?
no
What was the major contributor of oxygen to earths early atmosphere?
photosynthsis
What added oxygen to earths early atmosphere?
Photosynthesis by plants
What does gas do to some scientist think was missing from earths early atmosphere?
oxygen
Minerals in old rock suggest that earths early atmosphere had little or no free oxygen?
Yes
How did bacteria change early earths atmosphere?
Earth's early atmosphere was primarily composed of carbon dioxide. Early bacteria used carbon dioxide as a source of fuel and as a result produced oxygen.
Which gases made up most of Earths early atmosphere?
mostly carbon dioxide with little or no oxygen.
