Two clear plastic clubs are visible on a table. The cup visible on the left has sediment on the bottom and water above it. The cup visible on the right has coarse rocks on the bottom and water and ice above it.

Scientists believe that Jupiter's icy moon, Europa, has a liquid-water ocean underneath its frozen surface. While we can’t see that ocean directly, we can use the mass and density of known substances to predict what exists underneath the surface. In this activity, students will use the fundamentals of density to propose a model for the interior structure of Europa.

View the full classroom activity on the JPL Education website