The levels of nitrogen and _______ in the atmosphere remain fairly constant, but the levels of the other gases may vary.
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The level of nitrogen in air is
71 %
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Answer:
'The level of nitrogen and oxygen are 'constant in the atmosphere.'
Explanation:
Air is a mixture comprising mainly of nitrogen (78%), 'oxygen (21%) and argon (0.9%)'. This is almost in a fixed proportion with other gases like carbon dioxide (0.3 -0.4%), water vapor and other' inert gases'.
The proportion of carbon dioxide and water vapor may vary due to pollution.
While nitrogen and oxygen play a vital role for living beings, the role of other elements in the air cannot be ignored.
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