The Coin Battery. So… What did we really do here?. Wet Cell: A Cell containing a liquid electrolyte Electrode : An electrical conductor. Electrochemical reactions occur on the surface of an electrode. Electrolyte : An electrically conductive substance. Electricity: The flow of electrons.
What happened when you held it between your index fingers?
In a battery electrons flow from the negative terminus to the positive one. Nickel to penny.
When you held the battery between your two index fingers you completed the electrical circuit, allowing electrons to flow!!!
The Baghdad battery was discovered just outside of Baghdad in 1936. It is believed to be about 2000 years old, making it the first known battery. Some scientists believe that ancient people used this battery for plating gold onto silver objects. Others say that it may have been used for medicinal purposes.
Coin battery picture
Positive-negative battery picture
Baghdad battery picture
Baghdad battery Cross-section
Baghdad Battery labelled diagram
Info on the Baghdad Battery
Info on the coin battery
Connolly, Sean, Wholly Irresponsible Science, London, England, Icon Books Ltd.