2006-12-24 03:09:36 · 7 answers · asked by donjamste 1 in Science & Mathematics ➔ Earth Sciences & Geology
I'm not sure what you are asking. I can only think of this. If an airplane flies above 10,000 ft. you need to have a pressurized cabin or a source of oxygen. So your height of oxygen level is 10,000 ft.
Another possibility of what you are asking is this. Today oxygen is about 21% of the air we breath. In major cities with strong pollution it can be as low as 10%! A few thousand years ago the air had about 50% more oxygen than today.
Hope this answers your question as I am not sure what you are asking.
2006-12-24 03:21:50 · answer #1 · answered by Bags 5 · 0⤊ 0⤋
Oxygen comprises 20 percent of total atmosphere elements. the height or altitude at which oxygen is found is above the ionosphere. However, as one climbs in altitude, oxygen and other atmospheric elements become scarce. The highest concentrations of the atmospheric elements are in the first 100,000 feet which is the troposphere. This is the volume which contains 100% of our weather. Above this layer is the strati sphere, which is divided into upper and lower by the Ozone (O<3) layer. Above this is the ionosphere. At this altitude, you get to see the pretty lights of the auroras boriallis. Air planes have been known to travel into the ionosphere and return without incident (I'm not saying which ones).
2006-12-25 00:08:13 · answer #2 · answered by John Sr. 2 · 0⤊ 0⤋
Is your question a time reference. Some scientists believe that the oxygen level was much higher in prehistoric times since the earth was a big hothouse,and a lush tropical paradise, even in Siberia. All that foliage produced enormous amounts of oxygen, and the levels may have been twice as high as now. Its also one of the factors that may have influenced the dinosaurs phenomenal growth.
2006-12-24 13:44:10 · answer #3 · answered by badabingbob 3 · 0⤊ 0⤋
I've heard in the ancient past,that oxygen as percent of the atmosphere was somewhat above 30%+! That was one reason why we had very large insects, like the dragonfly with 12 inch wingspan etc! All these changes happened without any input from mankind! Think about it!
2006-12-24 11:48:18 · answer #4 · answered by Anonymous · 2⤊ 0⤋
The mix of gases by percentage in the earth's atmosphere is similar as you go up in altitude. However, the total pressure exerted by the gas decreases. The boundary between atmosphere and space is oftened defined as the Karman Line at 100km.
2006-12-24 12:20:15 · answer #5 · answered by Jerry P 6 · 0⤊ 0⤋
The `Troposhere` is 5 miles high at the poles + 10 miles at equator.
2006-12-25 18:51:48 · answer #6 · answered by CLIVE C 3 · 0⤊ 0⤋
I'm not quite sure what you're asking. Unless you mean what percentage of the air is oxygen then that would be 20%. Please be more specific.
2006-12-24 11:19:35 · answer #7 · answered by Jonny Wilko 1 · 0⤊ 0⤋