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Which real-world scenarios below represent physical and chemical changes? -running a car -exploding fireworks -mixing water and powdered drink mix -combining oil and vinegar to make salad dressing -taking aspirin for a headache -diluting bleach with water-digesting dinner-spreading peanut butter on bread

Compare and contrast physical changes with chemical changes.

What produces wave a)sound b) heats c)transfer of energy d)vibrations