Which of the following lists the correct sequence of gases, from most to least, in terms of percentage within the homosphere?
A) nitrogen, argon, oxygen, xenon, carbon dioxide
B) nitrogen, oxygen, argon, carbon dioxide, trace gases
C) oxygen, ozone, nitrogen, PAN, carbon dioxide
D) oxygen, nitrogen, neon, hydrocarbons, carbon dioxide

Question

Quizplus · Accepted Answer

Nitrogen and oxygen are the two most abundant gases in the homosphere, making up 99% of the atmosphere. Argon is the third most abundant gas, making up 0.93% of the atmosphere. Carbon dioxide and other trace gases are present in much lower percentages. Option A is incorrect as xenon is not a significant component of the atmosphere. Option C is incorrect as ozone and PAN are not major components of the homosphere, and option D is incorrect as neon and hydrocarbons are not major components either.

Which of the Following Lists the Correct Sequence of Gases