Today we learnt all about using switches in electric circuits, what materials act as conductors of electricity and what materials act as insulators.
We used home-made switches with paper clips, screws, safety pins and aluminium foil. We also tested to see if rubber, coins, paper, wood, plastic and keys would conduct or insulate.
This switch was made using a folded peice of card, covered top and bottom, with aluminium foil!
IT WORKED!!! (can you see the bulb is lit?)
This switch was made using safety pins to complete the circuit across two screws that the crocodile clips were attached to. This also worked as a conductor. We tried replacing the safety pin with rubber, wood, paper or plastic and the bulb did not light up. They were insulators.
Our results were:
Conductors Insulators
Coins Rubber
Keys Wood
Safety pins Plastic
Paper
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