Start learning →

Mercury is closest to the Sun, yet its nights freeze. Why?

AIt has a thick cloud blanket
BIt is tilted on its side
CIt has deep icy oceans
DIt has a very thin atmosphere
Answer & Solution
Correct answer: D. It has a very thin atmosphere
With almost no atmosphere, Mercury cannot hold heat after sunset, so its temperature falls to about minus 170 degrees Celsius at night.
Practise this question with Quill — Olympiad (Class 5) →

Keep practising Universe

Browse all Universe questions for Olympiad (Class 5), or explore more General Knowledge topics.

Start a Universe lesson →
Related questions