Air by definition is a mixture of gases. Within this mixture, 78% is nitrogen and 20% is oxygen. The remainder is argon and trace gases.
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21% Oxygen, 78% Nitrogen, 1% other gasses in out 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%.
Argon makes up about 0.93% of Earth's atmosphere by volume.
Saturn has an atmosphere, but it is not like Earth's. Saturn's atmosphere is composed primarily of hydrogen with some helium, small amounts of methane, ammonia, and trace other gasses. Earth's atmosphere is primarily nitrogen and oxygen with small amounts of water vapor, argon, carbon dioxide and trace gasses.
Nitrogen makes up about 77% of earths gasses oxegen is 21% of earths gases corbon dioxide is 1% arogon is 1% as well
Assorted gases such as argon, the rest of the atmosphere is pretty much just Oxygen and Nitrogen.
Nitrogen accounts for 78% of the atmosphere.
The earths atmosphere is made up of 78% nitrogen and 21% oxygen
I don't know what the figure is, but it must be pretty low because carbon monoxide is poisonous and we don't seem to suffer too much.
No
The earths atmosphere is made up of 78% nitrogen and 21% oxygen
Very, very little, as Mercury's atmosphere is almost a vacuum only minute traces of gasses are found.
the biosphere is everything where organisms live so pretty much all of earth and atmosphere is a layer of gasses surrounding the earth
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Mostly 75 percent
The Earth looks bright - thus much of the light reaching Earth is reflected back into space.