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Play different notes by shortening the coil.

Liquid oxygen sticks to the poles of a magnet, exhibiting paramagnetism that is predicted using molecular orbital theory. A large magnet with a small cylindrical gap allows a stream of liquid nitrogen to pass over and through. Poured liquid oxygen hangs...

The circuits are built into large wood boards that mount easily onto an easel. The boards are labeled using conventional symbolism. Bulbs and batteries are easily removable--just be careful not to burn your fingers on the hot bulbs!

Parallel vs Series

Homemade chemistry-lab style battery in a beaker.

This is actually just show and tell, lead plate and lead/lead oxide plate in a battery jar.

Use a gel cell battery to show electrical current at an integer multiple of the cell voltage between lead and lead...

Copper and zinc plates connected by micro-ammeter; your hand completes the circuit.

Clean copper and zinc sheet metal stock is cut into strips or pads. Alligator clip a zinc strip and a copper strip and plug the leads into a modern multimeter. DC 2V...

Insulating glass becomes a conductor of electricity when heated red-hot with a blowtorch. (m) (T+)

What it Shows

At room temerature, glass is almost as good an insulator as hard rubber. When heated to 1000 K, however, glass has a resistivity of less than 10...