Compared to a cold molecular cloud at 10 K, an HII region has a temperature about
A) 1,000,000 times hotter.
B) 1,000 times hotter.
C) 10 times hotter.
D) the same.

Question

Quizplus · Accepted Answer

An HII region, which is an area of ionized hydrogen around young, hot stars, typically has a temperature of about 10,000 K, making it approximately 1,000 times hotter than a cold molecular cloud at 10 K.

Compared to a Cold Molecular Cloud at 10 K, an HII