Answer:
1. Sink
2. Float
Step-by-step explanation:
Density of a substance refers to its mass per unit volume. Substances are of varying densities. Depending on the density of a substance, it can either sink or float in the presence of another substance with varying density.
If the density of one substance is greater than that of another, the denser substance will SINK when it encounters the less-dense substance. On the other hand, If a substance's density is less than that of another substance, it will FLOAT on the denser substance.