This activity introduces young scholars to the important concept of density. The focus is on the more easily understood densities of solids, but students can also explore the densities of liquids and gases. Young scholars devise methods...

Young scholars use modeling clay, a material that is denser than water and thus ordinarily sinks in water, to discover the principle of buoyancy. They begin by designing and building boats out of clay that will float in water, and then...

This video explains how the early Greek mathematician Archimedes discovered the principle relating density, volume, and displacement of water. [3:01] Includes a brief quiz and a list of additional resources to explore.