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how oxygen is form in the atmosphere? what is the use of it in the atmosphere?

how oxygen is form in the atmosphere? what is the use of it in the atmosphere?

Grade:12th pass

1 Answers

Deepak Kumar Shringi
askIITians Faculty 4404 Points
5 years ago
Atmospheric oxygenrefers to the abundance ofmolecular oxygen,O2, in the atmosphere; especially in thetropospherethat allows life to flourish. Atmospheric oxygen is the most importantneedhumans have, even more important thanfood).

the progression of O2over earth's geologic history. While possibly not at the peak experienced 10's of millions of years ago, the level of atmospheric oxygen levels (~21%) are high enough to allow Earth's ecological systems (and humans) to flourish.[1]Significant levels of O2are, cosmically, really quite rare![3]Oxygen willchemically reactwith almost anything, so having such a large amount of oxygen available in the atmosphere means that it must be continuously produced. The oxygen is produced byphotosynthesis, but if that were to ever stopchemical reactionswould make it all go away quite rapidly. If the chemical signature of molecular oxygen were found on another planet it would be a sure sign of life, since molecular oxygen wouldn't exist without life creating it.

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