Weird Science: GI Joe and The Dead Sea

In plain water, our GI Joe sinks straight down when dropped in the water.

With half a cup of salt added to our water, GI Joe sinks, but much slower.

With 1 cup of salt added to our water, GI Joe will float, keeping his weapon above the water, mind you!

Explanation: Salt water is denser, or heavier. Fewer water molecules are displaced, or forced out of position.