Was there oxygen on earth at earths first existence?

Question

I have to write notes about this question for holiday work. Can you please help?

The question is....

Some theories suggest that the earths atmosphere was mainly co2 and there was little oxygen. There may have been water vapour.

Can you please help me as i have no idea what to write!

Thank you.

Answer 1

there was always oxygen as our planet once a volcanic planet needs oxygen to keep lava alive as you need it and also it was always around just never as much as now but a few million years after lava it was so oxygenated no one would survive

so yes there was

Answer 2

There was no FREE oxygen in the atmosphere of Earth as it first formed.  It would have combined quickly with either the surface or with other gases or particles in the atmosphere.  However, unless the early atmosphere lacked carbon dioxide or water vapor oxygen was present within those substances.

Also some of the atmospheric oxygen is formed, not by green plants, but from dissociation of water into hydrogen and oxygen, at high altitude levels (energy from the sun causes this).  Probably oxygen from this source is unimportant to the overall mass of the atmosphere.

Answer 3

Look up "Banded Iron-Formations".  You will find evidence that there was relatively little free oxygen on earth for the first, very roughly, 2 billion years of its existence, since what there was was removed by reaction with Fe2+ to make Fe3+. Around 2 billion years ago, massive production of oxygen, probably by organisms like blue-green algae, led to the formation of massive iron ore deposits, and then to the buildup of free oxygen in the atmosphere.

Visit a library, or spend some time searching online, for the history of the earth's atmosphere.

Answer 4

No because there was no plantlife

Answer 5

no

the oxygen came from these organisms, they produced it and thats how our atmosphere came to be the way it is now. over millions of years

i forget what the organisms were called but they were responsible for our atmosphere

Answer 6

Yes, because then adam (being a human) would not have survived without it.

Answer 7

Rocks from a core nearly a kilometre long show oxygen appeared on Earth millions of years earlier than previously thought. In the past it was thought oxygen first appeared somewhere around 2.3 or 2.4 billion years ago – known as the Great Oxidation Event – but the new rock cores show there was at least a whiff of oxygen around 100 million years earlier

Answer 8

depends what you believe in , If you believe in God then you'd believe that the world was made perfect, if you don't then you have to figure it out for yourself

Answer 9

I think it unlikely that there would be free oxygen in the earth atmosphere before oxygen producinglife evolved. Oxygen is a highly reactive molecule an would quickly bond with any un oxygenated material it found. Other chemical reactions occurring on the planet at that time may have produced pockets of oxygenated atmosphere however these would not have survived long.

Answer 10

You cant have water vapour without oxygen