I can transform matter from one state to another, but I require energy. What am I?
Category: Science · Difficulty: hard
Hint: I include melting, boiling, and freezing.
Answer
Phase change
Explanation
Phase change refers to the transition of matter between solid, liquid, and gas states, requiring energy input or release.
This is a hard science riddle — a tricky one that takes a little thought. The answer is Phase change.
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