Ninety percent of our atmosphere lies below an altitude of about:
A) 31 km.
B) 65 km.
C) 16 km.
D) 6 km.
E) 100 km.

Question

Quizplus · Accepted Answer

The troposphere, which is the lowest layer of the atmosphere where weather occurs, extends from the surface up to an average altitude of about 16 kilometers (10 miles) above sea level. This layer contains about 90% of the total mass of the atmosphere. Therefore, choice C is the best answer.

Ninety Percent of Our Atmosphere Lies Below an Altitude of About