Question

What happens when a substance undergoes a physical change?

A: Some physical properties change, but the substance keeps its identity.
B: No physical properties change, and the substance keeps its identity.
C: Some physical properties change, and the substance changes its identity.
D: No physical properties change, but the substance changes its identity.

Answer 1

Answer;

A: Some physical properties change, but the substance keeps its identity.

Step-by-step explanation;

Physical changes occur when objects or substances undergo a change that does not change their chemical composition. This is different from chemical change in which the composition of a substance changes or one or more substances combine or break up to form new substances.

A physical change in a substance doesn't change what the substance is. In a chemical change where there is a chemical reaction, a new substance is formed and energy is either given off or absorbed.