The thermopause is located
A) between the mesosphere and the thermosphere.
B) wherever -90°C (-130°F) is recorded.
C) approximately 480 km (300 mi.) above Earth's surface.
D) at the bottom of the homosphere.

Question

Quizplus · Accepted Answer

The thermopause is located approximately 480 km (300 mi.) above Earth's surface. It separates the thermosphere from the exosphere, which is the outermost layer of the Earth's atmosphere. The temperature at the thermopause can vary depending on solar activity, but it is generally around -90°C (-130°F). It is not located between the mesosphere and the thermosphere, at the bottom of the homosphere, or determined by temperature alone.

The Thermopause Is Located