Question

liquid plastic is frozen in a physical change that increases its volume. what can be known about the plastic after the change?

○ its mass will increase.
○ its density will increase.
○ its mass will remain the same.
○ its density will remain the same.

Explanation:

In a physical change (like freezing liquid plastic), mass is conserved, meaning the amount of matter (mass) doesn't change. Volume increases here. Density is calculated as $
ho = \frac{m}{V}$ (mass over volume). Since mass ($m$) stays the same and volume ($V$) increases, density will decrease. So mass remains the same.

Answer:

C. Its mass will remain the same.