Enrichment Activity for 5-11 11-14
- Level Elementary
What you need
- A piece of polystyrene
- A clean foil quiche tin
- A drawing pin
- A pencil with a rubber end
- A woollen glove
- Push the drawing pin through the centre of the foil tin and push the rubber end of the pencil on to it to form a handle
- Rub the polystyrene quickly with the glove
- Using the pencil handle, put the foil tin on top of the polystyrene. Don’t touch the foil or the polystyrene
- Bring an outstretched finger close to the tin and see what happens
Results and Explanation
You should hear, feel and maybe even see a tiny spark!
Rubbing the polystyrene makes it negatively charged. This excess charge repels the electrons in the foil. Your finger provides an escape route for the electrons in the foil and as they jump the gap you get a small electric shock.