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The process that produces most of the oxygen in Earths atmosphere is photosynthesis. Plants use this process to create food.
Helium itself is not toxic but it can displace oxygen, meaning it can create an atmosphere without oxygen simply by pushing it out of the way.
21% of the atmosphere is oxygen.
The atmosphere is 79.9% oxygen.
Putting hydrogen into a fire extinguisher would create a very dangerous device. Compressed hydrogen gas burns very rapidly when mixed with oxygen and ignited. This could cause an explosion resulting in damage and injury.
Because it's atmosphere is significantly weaker and much less dense than earth's. And also because there is no plant life to create oxygen.
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
The moon has no oxygen because it has no atmosphere.
No, there is no oxygen in Mercury's atmosphere because Mercury does not have an atmosphere.
The oxygen formed in upper atmosphere is not for breathing. It forms again into ozone by natural phenomenons.
It would be impossible for oxygen requiring organisms to exist before photosynthetic organisms because there was not oxygen in the atmosphere for these organisms to breathe. Photosynthetic organisms take carbon dioxide and water in and create oxygen as waste. Before these photosynthetic organisms existed there was not enough or any oxygen in the atmosphere for organisms requiring oxygen to survive.
Yes, oxygen makes up 20.9% of the atmosphere.