Multiple choice

Which answer shows only examples of physical changes?

  1. cutting your hair, burning paper, melting ice cream

  2. fireworks, baking a cake, digesting food

  3. building a fire, making toast, breaking a pencil

  4. cutting vegetables, mowing the lawn, freezing water
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Physical changes do not change the chemical identity of the substance. Cutting vegetables, mowing the lawn, and freezing water are all physical changes because the material remains the same.

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