Which of the following gases,which we might be able to detect in infrared spectra,would be a strong indicator of life on another planet?
A)carbon dioxide
B)ozone
C)methane
D)water vapor
E)sulfuric acid

Question

Quizplus · Accepted Answer

Ozone is a strong indicator of life because it is produced by the interaction of ultraviolet light with oxygen, which is continually regenerated by biological processes on Earth. Therefore, the presence of ozone in another planet's atmosphere might suggest the presence of life. Carbon dioxide, methane, and water vapor can also be produced by non-biological processes, and sulfuric acid is not typically associated with life.

Which of the Following Gases,which We Might Be Able to Detect