Conductor and insulators.

Conductors: a substance which allows electricity to flow through it, f. ex copper are used to carry current, electric current is carried round your home by copper wires.
Iron silver, tin, aluminum, gold, mercury and carbon are conductors
Insulators: a substance which does not allow electricity to flow through it. Insulators are used for safety. The electricity used in your home can be dangerous. You could easily be killed if you touched a bare wire. That is why plugs and wires are covered with insulators like: rubber, plastic, wood, wool, paper, glass, sting, nylon etc…..

Making the right connectors.
The quiz board
The railway signal
When a battery is working, the energy change is:
Chemical energy---- to electrical energy.
The battery´s chemical energy is used up pushing a current round the circuit. The ´´electrical push´´ which the battery gives to the current is called the voltage. It is measured in different volts (v) on a volt-meter.
Different batteries produce different voltages. The bigger voltage supplied by the battery the bigger will be the current that flows in a circuit.