In general, when a substance changes from a solid to a liquid,

Question

A.
the density of the substance decreases.
B.
the density of the substance increases.
C.
the density of the substance remains the same.
D.
the substance no longer has density since density is a property only solids have.

Answer 1

In general, when a substance changes from a solid to a liquid, the density of the substance can vary depending on the specific material. However, most substances tend to decrease in density when they melt from solid to liquid, with the notable exception of water, which actually expands and becomes less dense when it freezes, causing ice to float.

Therefore, for most substances, the correct answer is:

A. the density of the substance decreases.

However, it's important to keep in mind that this is not a universal rule for all materials. Always check the specific properties of the material in question.