An example of a virtual lab is depicted in Figure 1. In this lab, which presents the domain
of buoyancy, students can go through different levels: they can start by manipulating
just the density of objects, then there is a level where just the volume and mass
(and thus density) of the solid object can be manipulated, a level where the density of
the fluid can also be changed, a level on Archimedes’ principle, and a level that also
displays forces.