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

This lesson plan is designed to have young children explore the concept of sinking vs. floating by using the skills of prediction, observation and classification.

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.

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.

Explore the use of ballast to manipulate buoyancy in submarines by building a model of a submersible using two-liter bottles and balloons. Describe the balance of forces that is responsible for the surfacing and diving of submersibles.