I can exist in three forms yet change at the slightest heat. What am I, the substance of everyday life?
Category: Science · Difficulty: expert
Hint: Think about ice, steam, and liquid.
Answer
H2O
Explanation
Water is unique as it exists in solid, liquid, and gas forms and is essential for all known life.
This is a expert science riddle — one of the harder riddles here. The answer is H2O.
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