The lower atmosphere is a nearly homogeneous mixture of gasses, the most plentiful is _________ at 78.1% followed by ___________ at 20.9 %.

The lower atmosphere is a nearly homogeneous mixture of gasses, the most plentiful is _________ at 78.1% followed by ___________ at 20.9 %.




a) oxygen, carbon dioxide
b) oxygen, nitrogen
c) nitrogen, oxygen
d) nitrogen, carbon dioxide







Answer: C