Answer:
mass : volume
Step-by-step explanation:
Density is a physical quantity. An intensive property which can be used to determine any substance in nature.
Density is a unique quantity because it highlights the mass per unit volume of a substance.
Mathematically;
Density =
Mass is the amount of matter contained in any substance
Volume is the space they occupy
We clearly see that the ratio of mass to volume gives the value of density.