In this experiment, you test whether two different bowling balls will float or sink, then determine the density of each of the balls to see if they are less than that of water.

Students investigate with common objects to see if they can make something that neither floats nor sinks, but rather "flinks" in the middle.

An experiment to determine if either a regular or a diet can of soda will float or sink when placed in water, and what causes this.

In this demonstration, students will brainstorm to find a solution as to why Diet Coke floats and Coke sinks. Through this exercise students will arrive at a definition of density.

Help students brainstorm and find a solution as to why Diet Coke floats and Coke sinks. Student will learn to define what density is as they engage in this creative lab. This resource is in PDF form; requires Adobe Reader.

Become an engineer, and design a submarine that moves in the water like a real submarine. Try making it sink, float, and hover in the water.

NOVA explores the basic principle of buoyancy. Also included at this site are some interesting brain-teasers related to the topic.

Try this at-home science experiment to learn if salt affects the way things float.

Investigate the mystery of the sinking of the Confederate submarine Hunley. Explore the mechanics of waterproofing a seal, and compare and contrast the effectiveness of a metal-to-metal seal versus one that uses a rubber gasket.