I can alter states from solid to gas, yet at a molecular level, I am a class. What am I?

Category: Science · Difficulty: expert

Hint: Consider the substance that has mass and occupies space.

Answer

Material

Explanation

Matter is anything that has mass and takes up space, existing in various states like solid, liquid, gas, and plasma.

This is a expert science riddle — one of the harder riddles here. The answer is Material.

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