MediumWater Riddle
When it is cold I expand and when it is warm I contract. What am I?
Riddle
When it is cold I expand and when it is warm I contract. What am I?
Choose an answer
A.Metal
B.Glass
C.Rubber
D.Water/ice
Hint: It's a 2-word phrase with 8 letters, starting with "W".
Answer
Water/ice
Why this is the answer
Unusually, this substance is one of the few that expands rather than contracts when it freezes.
This riddle is filed under Planet Riddles and rated Medium.