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
- With the wire, connect the red terminal of the battery with a copper electrode. Now connect the black terminal the same way.
- With the third wire left, connect the positive terminal of the batter to the copper plate.
- Fill the glass with water and place the copper electrodes in it without them touching each other. Nothing happens to the voltmeter.
- Remove the electrodes and add salt to the water. Stir, and immerse the electrodes.
- The voltmeter will show a deflection!
- You can also use a bulb instead of a battery.
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