What gas do we breathe in that helps us stay alive but we can't see?
Category: Science · Difficulty: easy
Hint: It's essential for life and makes up about 21% of the air.
Answer
Oxygen
Explanation
Oxygen is the gas we breathe in to help our bodies function; it's invisible and essential for survival.
This is an easy science riddle — a good one for children and beginners. The answer is Oxygen.
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