If you are interested in trying a fun and simple science project with your children, why not try an electricity conductivity experiment with salt water? This experiment proves that pure water is not a good conductor but with salt, it is ionized and turns into a conductor.

 

Here is how the experiment it done:

 

Things you will need

 

  • Water glass
  • Water
  • Battery (4-5 Volts)
  • 3 wires
  • 2 copper electrodes
  • Salt
  • Spoon

 

Instructions

 

  1. With the wire, connect the red terminal of the battery with a copper electrode. Now connect the black terminal the same way.

 

  1. With the third wire left, connect the positive terminal of the batter to the copper plate.

 

  1. Fill the glass with water and place the copper electrodes in it without them touching each other. Nothing happens to the voltmeter.

 

  1. Remove the electrodes and add salt to the water. Stir, and immerse the electrodes.

 

  1. The voltmeter will show a deflection!

 

  1. You can also use a bulb instead of a battery.