Question

Samples of different materials, A and B, have the same mass, but the sample

of A is higher in density. Which statement could explain why this is so?
A. The particles that make up material A have more mass than the
particles that make up material B.
B. The particles that make up material B are more closely packed
together than the particles that make up material A.
C. The sample of material A has greater volume than the sample of
material B.
OD. The particles that make up material B have more mass than the
particles that make up material A.

Answer 1

Answer: A: The particles that make up material A have more mass than the particles that make up material B.

Step-by-step explanation:

The density of a material changes when it changes phases of matter (gas, liquid solid). Its mass does not change because its particles do not disappear - they are just rearranged and occupy a different volume. Density =
`(mass)/(volume)`. A greater volume would mean the density decreases, a greater mass would mean the density increases. Because it is in the denominator, decreasing the volume would also increase the density.