Multiple choice

Name the lightest planet which can even float in a sea of water.

  1. Uranus

  2. Saturn

  3. Neptune

  4. Earth
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Saturn is the least dense planet in the solar system, with a density of about 0.687 g/cm^3. Because this is less than the density of water (1 g/cm^3), the planet would theoretically float in a large enough body of water.

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