University of Virginia: Bell Jar Demonstration

Young astronomers learn about the Big Bang Theory and redshift through a hands-on activity in the last installment of a three-part series. Participants draw dots on balloons and then inflate them to model how galaxies moved farther apart...

Using simple materials, an informative lesson demonstrates the Law of Conservation of Matter and explains how to balance chemical equations. Young chemists perform experiments, analyze reactions, and balance chemical equations...

Earth science explorers design an experiment to demonstrate that the albedo of a surface affects its temperature. They test to find out if moisture on the surface affects temperature. They discover whether or not concrete or asphalt heat...

A detailed survey of the invention and evolution of the telephone. This scholarly article includes a Master Map that shows Bell's thought processes as he developed the telephone, with each step linked to more in-depth information. The...

A collection of projects that recreated Isaac Newton's experiments as he would have built them in the seventeenth century. The projects include the mechanical advantage possible using three levers, the trajectory of a projectile, air...

A page from the University of Maryland Physics Lecture Demonstration Facility. Provides directions for a teacher demonstration which utilizes a Bell jar and vacuum pump to show the dependency of boiling point upon pressure. Shows...

Students study the history of the telephone and its inventor.  In this communications lesson students complete a tuning fork experiment to further demonstrate how sound is produced.

A bell jar, Peeps and balloons demonstrate how changing the atmospheric pressure around objects can change their size. [3:18]

Take your class up, up, and away with an engaging weather balloon simulation! Individuals get hands-on experience in creating and launching their own airborne labs to study how temperature and pressure affect substances at 100,000...

Exactly what causes the the pain you feel when diving to the deep end of a pool? Find out with this short video that explores the physical laws governing the behavior of gases and the ways they affect marine life...