Step 5: Electricity

Picture of Electricity
Only a 3 battery and UV led are needed to demonstrate a simple electrical circuit. A resistor will be necessary for higher voltage batteries like the 9 volt battery shown here. 
  • Students can learn the difference between conductors and insulators.
  • They can experiment using a pencil mark on paper as a variable resistor to dim and brighten the LED.
  • Aluminum foil can be used to fashion a simple switch.
The possibilities are endless.