KS2 Science Quiz - Electrical Conductors and Insulators (Questions)

In this KS2 Science quiz we take a closer look at two things which are vital if we want to control electricity - electrical conductors and insulators.

Electrical conductors and insulators control heat. There’s nothing like a power cut to make you grateful for electricity! Ordinarily, people take it for granted but we haven’t always had power in our homes. The brilliant Serbian inventor and electrical engineer, Nicola Tesla, invented the generating system which sends electricity to our homes. He also created a method to harness electrical energy and send it anywhere on Earth, although he died before it was completed.

In order to harness electricity, you need to know all about electrical conductors and insulators. Do you know why electrical plugs are made from plastic or why insulators are important in an electrical circuit? Check your knowledge with this science quiz.

1. A material which is an electrical insulator does what?
[ ] It does not allow electricity to pass through it easily
[ ] It does not allow heat to travel through it easily
[ ] It allows heat to travel through it easily
[ ] It allows electricity to pass through it easily
2. A material which is an electrical conductor does what?
[ ] It does not allow electricity to pass through it easily
[ ] It does not allow heat to travel through it easily
[ ] It allows heat to travel through it easily
[ ] It allows electricity to pass through it easily
3. In a complete electrical circuit, which materials does electricity flow through?
[ ] Electrical insulators
[ ] Electrical conductors
[ ] Only leads or wires
[ ] Only batteries
4. Which of these is not an electrical conductor?
[ ] Gold
[ ] Copper
[ ] Aluminium
[ ] Rubber
5. Which of these is not an electrical insulator?
[ ] Wood
[ ] Plastic
[ ] Silver
[ ] Glass
6. Why are electrical plugs made of plastic?
[ ] Plastic is stronger than all other materials
[ ] Plastic is a good electrical conductor
[ ] Plastic protects people from electricity
[ ] Only plastic can be made into the right shape for a plug
7. Which of these is a good electrical conductor?
[ ] Water
[ ] Sweat
[ ] The human body
[ ] All of the above
8. Why are insulators important in an electrical circuit?
[ ] They make the circuit safe to touch
[ ] Electricity will only flow through insulators
[ ] Light bulbs and buzzers are only made of insulating materials
[ ] All of the above
9. Which of these could be used to complete an electrical circuit?
[ ] A piece of gravel
[ ] A rubber
[ ] A crayon
[ ] A pair of scissors
10. The filament in a light bulb glows because of the material's resistance. What does this mean?
[ ] The filament does not allow the flow of electricity
[ ] The filament speeds up the flow of electricity
[ ] The filament slows down the flow of electricity
[ ] The filament gets annoyed with the electricity

 

KS2 Science Quiz - Electrical Conductors and Insulators (Answers)
1. A material which is an electrical insulator does what?
[x] It does not allow electricity to pass through it easily
[ ] It does not allow heat to travel through it easily
[ ] It allows heat to travel through it easily
[ ] It allows electricity to pass through it easily
Insulators are used to prevent electricity from passing through
2. A material which is an electrical conductor does what?
[ ] It does not allow electricity to pass through it easily
[ ] It does not allow heat to travel through it easily
[ ] It allows heat to travel through it easily
[x] It allows electricity to pass through it easily
Conductors are used to transfer electricity from one place to another, for example in a circuit
3. In a complete electrical circuit, which materials does electricity flow through?
[ ] Electrical insulators
[x] Electrical conductors
[ ] Only leads or wires
[ ] Only batteries
Every component (part) of a complete electrical circuit must include a material which conducts electricity
4. Which of these is not an electrical conductor?
[ ] Gold
[ ] Copper
[ ] Aluminium
[x] Rubber
Rubber is an excellent electrical insulator
5. Which of these is not an electrical insulator?
[ ] Wood
[ ] Plastic
[x] Silver
[ ] Glass
Silver, like other metals, is not a good electrical insulator. In fact, silver is the best electrical conductor. Because of its expense, it is not used as often as copper
6. Why are electrical plugs made of plastic?
[ ] Plastic is stronger than all other materials
[ ] Plastic is a good electrical conductor
[x] Plastic protects people from electricity
[ ] Only plastic can be made into the right shape for a plug
Plastic is an electrical insulator. If plugs weren't made of plastic (or another insulator), it would be impossible to touch the plug without receiving an extremely dangerous electric shock
7. Which of these is a good electrical conductor?
[ ] Water
[ ] Sweat
[ ] The human body
[x] All of the above
Electricity passes easily though anything wet, such as sweaty hands, and also through the human body. This is why it is so important to NEVER touch a live lead and to always be careful when using electrical objects. Never touch anything electric when you have damp hands
8. Why are insulators important in an electrical circuit?
[x] They make the circuit safe to touch
[ ] Electricity will only flow through insulators
[ ] Light bulbs and buzzers are only made of insulating materials
[ ] All of the above
Insulating materials protect us (and other living organisms) from electrical currents and they also protect the circuit from damage or interference
9. Which of these could be used to complete an electrical circuit?
[ ] A piece of gravel
[ ] A rubber
[ ] A crayon
[x] A pair of scissors
Scissors are made of metal and all metals can conduct electricity
10. The filament in a light bulb glows because of the material's resistance. What does this mean?
[ ] The filament does not allow the flow of electricity
[ ] The filament speeds up the flow of electricity
[x] The filament slows down the flow of electricity
[ ] The filament gets annoyed with the electricity
Resistivity is a measure of how well materials conduct electricity - less resistance means greater conductivity