Question

What is a physical change? (1 point)
Responses

a change that is visible
a change that is visible

a change that does not change the chemical identity of a substance
a change that does not change the chemical identity of a substance

a change that does change the chemical identity of a substance
a change that does change the chemical identity of a substance

a change that is not visible

Answer 1

A physical change is **a change that does not change the chemical identity of a substance**.