Mercury goes around the Sun every 88 days. The Moon goes around Earth every 28 days. Earth orbits the Sun about every 365 days. Earth makes one turn on its axis every 24 hours.
I gave my students this multiple choice question: Which of these describes rotation?

Only one answer is correct among these 4 choices:
- Mercury goes around the Sun every 88 days.
- The Moon goes around Earth every 28 days.
- Earth orbits the Sun about every 365 days.
- Earth makes one turn on its axis every 24 hours.

Could you tell me which one is correct?

Earth makes one turn on its axis every 24 hours.