Final answer:
The term that describes the amount of mass contained per unit volume is density, which is calculated as the mass divided by the volume (ρ = m/V).
Step-by-step explanation:
The term that describes the amount of mass contained per unit volume is density. Density is defined as the mass-to-volume ratio of a substance, or the mass divided by the volume. In scientific terms, it is represented by the Greek letter rho (ρ), and the formula for calculating density is ρ = m/V, where m represents mass and V represents volume. For example, if a sample of iron has a mass of 23.4 grams and occupies a volume of 3.00 cm³, its density can be calculated as 23.4 g / 3.00 cm³ = 7.8 g/cm³.