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Q: When did oxygen start to appear in the atmosphere?
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How high up does oxygen start to get thin?

Based on how oxygen flows, the higher you start to go up into the atmosphere the thinner the oxygen is and the harder it is to breath. You start to notice a difference at an altitude of 8,000 feet.


Can you start a fire on the moon?

No. The moon has no atmosphere so there is no oxygen to support combustion.


How did oxygen first appear in the atmosphere?

It is believed that when primitive algae flourished on an early earth, they pumped out zillions of cubic kilometres of this gas. Before them, oxygen wasn't around in the atmosphere in very large quantities. After long, long periods of time, the percentage of oxygen in the atmosphere rose. It is to these early life forms that we owe the "air" and the atmosphere that supports us now.


What is the oxygen content of the atmosphere?

The atmosphere is 79.9% oxygen.


What percent of the atmosphere is oxygen'?

21% of the atmosphere is oxygen.


What is an aerobic atmosphere?

the environment which has the availability of oxygen it is called aerobic atmosphere and if the availability of oxygen is not there in atmosphere then it is anaerobic type We live in a aerobic atmosphere which has the oxygen available


Is there oxygen in Mercury?

No, there is no oxygen in Mercury's atmosphere because Mercury does not have an atmosphere.


Why doesnt the moon have oxygen?

The moon has no oxygen because it has no atmosphere.


Where does the troposphere start?

The troposphere is the lowest layer of the atmosphere. It starts on the surface of the planet and it is comprised of nitrogen and oxygen.


Is the atmosphere partly oxygen?

Yes, oxygen makes up 20.9% of the atmosphere.


What makes molecular oxygen in our atmosphere?

Cyanobacteria make molecular oxygen in our atmosphere.


What gives more oxygen to the atmosphere?

Plankton gives more oxygen to the atmosphere.