Cambridge Science – States of Matter Practice Test

Volume is the amount of space an object occupies in three dimensions. It tells you how much room the object takes up. This is different from mass, which is how much matter is in the object, and from weight, which is the gravitational force on that mass. Density combines both concepts as mass per unit volume. For example, a cube 2 cm on each side has a volume of 8 cm^3, showing how volume measures space independent of how heavy the object is.