The region of the atmosphere that is so evenly mixed that it behaves as if it were a single gas is the
A) homosphere.
B) heterosphere.
C) exosphere.
D) thermosphere.

Question

Quizplus · Accepted Answer

The term homosphere refers to the lower part of the Earth's atmosphere, where gases are well-mixed and behave as a single gas. The homosphere extends from the Earth's surface up to about 50-80 km altitude, depending on latitude and season. Above this altitude, the composition of the atmosphere changes significantly, and the heterosphere begins.

The Region of the Atmosphere That Is So Evenly Mixed