Steve Spangler Science
Dancing Raisins - The Bubble Lifter
Here is an engaging demonstration of density that you can do with your young physical scientists. Place different rough surfaced objects into carbonated liquid. The carbon dioxide bubbles collect on the surface of the objects and...
Bozeman Science
Properties of Matter
The properties of matter including buoyancy, viscosity, density, pressure, and more are explained in a video that also describes the various principles and laws that are associated with each property.