MediumHard Science
Which is the only rock that floats?
Riddle
Which is the only rock that floats?
Choose an answer
A.Granite
B.Basalt
C.Slate
D.Pumice
Hint: It's a word with 6 letters, starting with "P".
Answer
Pumice
Why this is the answer
Pumice is a volcanic rock full of air bubbles, giving it a density lower than water.
This riddle is filed under Science Riddles and rated Medium.