Multiple choice

The period of ____of a planet is proportional to its distance from the Sun.

  1. revolution

  2. rotation

  3. life

  4. orbiting

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

According to Kepler's third law, the square of a planet's orbital period is proportional to the cube of its average distance from the Sun. Revolution refers to a planet's complete orbit around the Sun, which takes longer for planets farther away.