Multiple choice general knowledge

Pumice is the only rock that floats in water.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This statement is false - pumice is not the only rock that floats. Several other volcanic rocks with high vesicularity (gas bubble holes) can also float, including some types of scoria and other lightweight volcanic rocks. The key factor is density - rocks with enough air pockets can be less dense than water.

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