30. A student correctly determined the

density of two rocks. If the volumes of

the two rocks are equal, the rock with

the greater density has a

A. rounder shape

B. smoother surface

C. greater mass

D. smaller size

Density of anything = (its volume) / (its mass)

If their volumes of are equal, then the rock with the greater density has a greater mass. (C)

It also weighs more than the other one, even though they have the same volume.

Answer: C

Explanation: Density = mass/volume

if dividing by same volume, need to increase mass in order to increase density.

same as 4=8/2 vs 8=16/2

increase numerator = increase in answer