# Electric circuits

> Grade 4: cell, wire, bulb, switch, a circuit must be complete, conductors and insulators, what a switch does, electricity safety.

Source: https://olyclass.com/library/science-g4-electric-circuits-en/

- Subject: Science
- Level: Grade 4
- Quiz: 16
- Play it free on one screen (projector, TV or whiteboard): https://olyclass.com/library?play=science-g4-electric-circuits-en
- Copy and edit it: https://olyclass.com/library?copy=science-g4-electric-circuits-en
- Games it plays well in: [Tug of War](https://olyclass.com/classroom-games/tug-of-war/), [Lucky Wheel](https://olyclass.com/classroom-games/lucky-wheel/), [Bowling](https://olyclass.com/classroom-games/bowling/), [Hoop Shot](https://olyclass.com/classroom-games/hoop-shot/)

## Questions

1. Which part of a simple circuit gives the energy to make the bulb light? (The bulb / The cell / The switch / The wire)
   Answer: The cell
2. What is the job of the wires in a circuit? (They carry electricity around / They make the light / They store sunlight / They turn the bulb off)
   Answer: They carry electricity around
3. Which part of a circuit gives out light? (The bulb / The cell / The switch / The wire)
   Answer: The bulb
4. Which part of a circuit can you press or flick by hand? (A bulb / A cell / A switch / A wire)
   Answer: A switch
5. A bulb is connected to a cell, but there is a gap in the wire. What happens? (The bulb does not light / The bulb flickers forever / The bulb lights brightly / The cell gets bigger)
   Answer: The bulb does not light
6. A circuit must be a complete loop for electricity to flow.
   Answer: True
7. Which material is a good electrical conductor? (Copper / Plastic / Rubber / Wood)
   Answer: Copper
8. Which material is an electrical insulator? (Aluminium foil / Copper / Iron / Rubber)
   Answer: Rubber
9. Why are electric wires covered in plastic? (Plastic is a conductor, so it speeds up electricity / Plastic is an insulator, so it keeps us safe / Plastic makes the electricity stronger / Plastic makes the wire shine and look nice)
   Answer: Plastic is an insulator, so it keeps us safe
10. When a switch is closed, the circuit is complete and the bulb can light.
   Answer: True
11. What does a switch do in a circuit? (It lights the bulb itself / It makes more electricity / It opens or closes a gap in the circuit / It stores electricity)
   Answer: It opens or closes a gap in the circuit
12. What word describes a circuit when its switch is off?
   Answer: Open (a broken circuit)
13. It is safe to put a metal object into a wall socket.
   Answer: False
14. Why should you never touch electrical sockets with wet hands? (Water can let electricity pass through / Water makes electricity stop / Water makes sockets quieter / Water makes the socket cold)
   Answer: Water can let electricity pass through
15. Name one metal that is a good conductor of electricity.
   Answer: Copper (also iron, aluminium, silver)
16. Name one electricity safety rule for children.
   Answer: Any: don't touch sockets, keep water away, don't touch power lines, don't pull plugs by the wire