The approximate, indistinct outer boundary of the atmosphere extends outward at least ________ kilometers above the surface.
A) 1,000
B) 2,500
C) 5,000
D) 6,000
E) thousands of kilometers

Question

Quizplus · Accepted Answer

The outer boundary of the atmosphere is not clearly defined and can extend for thousands of kilometers above the surface, therefore the best choice is E.

The Approximate, Indistinct Outer Boundary of the Atmosphere Extends Outward