A variable gas in the atmosphere nearly absent from the higher elevations is ________.
A) carbon dioxide
B) ozone
C) sulfur dioxide
D) carbon monoxide
E) water vapor

Question

Quizplus · Accepted Answer

Water vapor is the correct answer because it significantly decreases with altitude in the atmosphere, unlike the other gases listed, which can be found at higher elevations albeit in varying concentrations.

A Variable Gas in the Atmosphere Nearly Absent from the Higher