Density

Here's a quick experiment Joanna did on the density of objects.

Joanna's findings:

The liquids in this cup are vegetable oil, water and syrup.  The objects are a cherry, a cork, an ice cube and a rock (which you can't really see - the rock is at the bottom of the syrup.) 

This experiment shows that objects and liquids that are less dense rise above the objects and liquids that are more dense.