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.

Answer 1

Fifteen grams of a liquid plastic are frozen in a physical change that increases the volume. What can be known about the plastic after the change It will still weigh 15 grams.  -Liquid water freezes to form ice.

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Answer 2

Its density will increase after the change.

• Density, mass and volume are related to each other by the formula : density = mass/volume.
• The relation states volume is inversely proportional to density.
• So, when volume increases density will decrease.
• Physical change is the change where no new product is formed and the changes are reversible, so the product can go back to its original shape.