Multiple choice general knowledge

The only rock that floats in water is pumice

  1. Basalt

  2. Pumice

  3. Granite

  4. Diabase

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

Pumice is a volcanic rock that is full of gas bubbles, making it less dense than water and causing it to float. Basalt, granite, and diabase are all dense rocks that sink.