I can change color with pH, but I'm not a mood ring. What am I?
Category: Science · Difficulty: hard
Hint: Think about what you use to test acidity.
Answer
pH test strip
Explanation
Litmus paper changes color depending on the pH of the solution it is immersed in, indicating whether it is acidic or basic.
This is a hard science riddle — a tricky one that takes a little thought. The answer is pH test strip.
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