Question

A physical change is...

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1. when a substance changes its appearance or form, but not its identity.

2. when a substance changes into a new substance.

3. when a substance catches on fire.

4. when a substance reacts with another substance.

Answer 1

1. when a substance changes its appearance or form, but not its identity.

Step-by-step explanation:

It basically applies makeup but you're still same person