1. Some solids conduct heat very well Metal conducts heat very well but cork doesnt - which is why the wax melts off of the end where its attached to the wire, but not off the end where its attached to the cork

2. Some Solids Conduct Heat Poorly Which is why we put hot drinks into polystyrene cups rather than glass beakers - to keep them warm and stop us burning our hands!

3. Some materials are also good electrical conductors Which is why we make electrical circuits out of metal wire and not strips of wood or rubber bands!

4. But some materials are not good electrical conductors So if we put cork in the circuit the bulb doesnt light up. Another bad conductor is plastic which is why we coat electrical wires with plastic - to make them safe to handle!