Material that conducts heat or electricity very poorly, and so can be used to provide some measure of protection. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual...

This video covers:<br/>
- What a surge is and how it can<br/> cause harm
- How safety features can pro<br/>tect us from that harm
- In particular: fuses, circuit breakers, earth wires and insulation