Multiple choice general knowledge

The mass of the moon in comparison to the earth is

  1. 1/4

  2. 1/80

  3. 1/100

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The Moon has about 1/80th of Earth's mass, which is why it has much weaker gravity (about 1/6th of Earth's surface gravity). This significant mass difference explains why the Moon orbits Earth rather than them orbiting a common center of mass. The fraction 1/4 would make the Moon far too massive.

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