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Close to 21%, near 20.95%.
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∙ 14y ago
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What planet has a nitrogen- oxygen atmosphere?
Earths atmosphere is rich in Oxygen, some 21% of the air is Oxygen. There is oxygen on other planets, but the percentage comes nowhere close to this. The percentage of Oxygen in earths atmosphere is thought to have been much higher in the past, before animals were about, but after the arrival of plants.
What is the approximate percentage of oxygen in the atmosphere?
Earth's atmosphere is about 21% oxygen by volume (for dry air).
What percentage of the air around us is oxygen?
The percentage of oxygen in the atmosphere is 20.75%. The atmosphere has many other elements that we breathe in besides oxygen. Oxygen needs to be present for life on earth.
How much percent oxygen present in your atmosphere?
the percentage of oxygen in the atmosphere today is about 20.95%. Or... if you round it you get the most common answer of 21%.
What percentage of the world atmosphere is oxygen?
28%
What percentage does nitrogen and oxygen make in the atmosphere?
Nitgrogen forms 80% of the Earth's atmosphere and oxygen 21%
What is the percentage for oxygen in the atmosphere?
roughly 21 percent.
What percentage of Earth's atmosphere iis oxygen?
21 %
What percentage of your atmospheric gases is oxygen?
My atmosphere is the same as your atmosphere since we all live on the same planet. Oxygen makes up about 19.5% of the atmosphere.
Which two gases make up the largest percentage of the atmosphere?
Nitrogen and oxygen make up the largest percentage of the atmosphere.
What caused the proportion of oxygen in the atmosphere to increase?
Plants started to grow on the earth, plants breath in carbon dioxide (which is why it decreased so much) and they breath out oxygen. That is why the percentage of oxygen has increased so much.
The highest percentage in the atmosphere is of?
The highest percentage in the Earth's atmosphere is nitrogen, at 78%. Then oxygen(21%) and CO2, 0.9%.
