Question

True or false in a physical change, the substance doesn't change its identity

Answer 1

A physical change are changes which alters a substance without changing its composition. So physical means without changing its substances. For example if we changed a persons appearances it would be a physical change, but that doesn't change who they are as a person or their identity. So, true.

Answer 2

In a chemical change, a substance cannot change back to the form it used to be in.
Ex. A Rusty Nail
In a physical change, it is reversible to change back into how the substance was; shape or size.
Ex: Freezing liquid is a physical change
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