Multiple choice What is the strength of an acid or base measured on a scale called? Vernier Scale Musical scale pH scale None of these Reveal answer Fill a bubble to check yourself C Correct answer Explanation The pH scale (0-14) measures how acidic or basic a solution is - pH < 7 is acidic, pH > 7 is basic, pH 7 is neutral. Vernier scale measures length, musical scale is for music. pH scale is the correct answer.