I alter the state of materials, turning solid dreams into liquid realities. What am I?

Category: Science · Difficulty: hard

Hint: Think of what causes ice to melt and water to boil.

Answer

Heat energy

Explanation

Heat energy affects the temperature and state of materials, causing them to change from solid to liquid.

This is a hard science riddle — a tricky one that takes a little thought. The answer is Heat energy.

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