The Density Column Experiment is an activity that introduces the concept of Density to students of science. Density if defined, is mass per unit volume. In other words, it is the relationship between the mass of a substance and the space it takes up. In many cases, if the volume taken up is the same, the denser substance would be heavier.
In this experiment, the students are asked to stack liquids on top of each other. This is done by looking up their density and putting in the heavier liquids into the container first before the lighter ones. The denser the liquid, the more it should sink.