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Science: Elementary School: Grades 3, 4 and 5 Quiz - Circuits and Switches (Questions)

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Electrical products work by using circuits and switches. Circuits allow electricity to flow through - and so power - bulbs, motors and buzzers. Switches are used to control circuits. They can break a circuit - and so switch bulbs, motors and buzzers off - or complete a circuit - and so switch them on again. Many products work by using electricity. How many items in your house work by using electricity? Probably more than you think. Count them and see.

1. What is the purpose of a switch in an electrical circuit?
[ ] To turn the power on and off
[ ] To turn the power on
[ ] To turn the power off
[ ] To complete the circuit
2. What must a circuit be joined with?
[ ] Wires
[ ] Metal
[ ] Batteries
[ ] String
3. What is the source of power in a circuit?
[ ] Bulb
[ ] Switch
[ ] Buzzer
[ ] Battery
4. What is the source of light in a circuit?
[ ] Bulb
[ ] Switch
[ ] Buzzer
[ ] Battery
5. Which of these is NOT a type of switch?
[ ] Tilt
[ ] Slope
[ ] Slide
[ ] Press
6. The casing for most electrical products should be made of what?
[ ] Insulating material
[ ] Conducting material
[ ] Metal
[ ] Paper
7. How does a switch turn a bulb off?
[ ] By breaking the circuit
[ ] By completing the circuit
[ ] By removing the bulb
[ ] By removing the battery
8. How does a switch turn a buzzer on?
[ ] By breaking the circuit
[ ] By completing the circuit
[ ] By removing the bulb
[ ] By removing the battery
9. Which component in a circuit causes something to turn?
[ ] Bulb
[ ] Wire
[ ] Buzzer
[ ] Motor
10. How can you make a bulb brighter in a circuit?
[ ] Add another motor
[ ] Add another battery
[ ] Remove the battery
[ ] Use a bigger bulb
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Science: Elementary School: Grades 3, 4 and 5 Quiz - Circuits and Switches (Answers)
1. What is the purpose of a switch in an electrical circuit?
[x] To turn the power on and off
[ ] To turn the power on
[ ] To turn the power off
[ ] To complete the circuit
Switches can turn power on and off. Think of the light switches at home
2. What must a circuit be joined with?
[ ] Wires
[x] Metal
[ ] Batteries
[ ] String
Electrical wires have metal inside them. Most circuits use wires but any metal will do
3. What is the source of power in a circuit?
[ ] Bulb
[ ] Switch
[ ] Buzzer
[x] Battery
Batteries can store energy and release it as electricity
4. What is the source of light in a circuit?
[x] Bulb
[ ] Switch
[ ] Buzzer
[ ] Battery
Electricity passes through a bulb and causes it to glow
5. Which of these is NOT a type of switch?
[ ] Tilt
[x] Slope
[ ] Slide
[ ] Press
Can you think of any other types of switches?
6. The casing for most electrical products should be made of what?
[x] Insulating material
[ ] Conducting material
[ ] Metal
[ ] Paper
Electricity does not pass through an insulating material such as rubber, therefore when you touch the product you do not hurt yourself
7. How does a switch turn a bulb off?
[x] By breaking the circuit
[ ] By completing the circuit
[ ] By removing the bulb
[ ] By removing the battery
When a switch is turned off the circuit is broken so electricity cannot flow through and the bulb gets no power
8. How does a switch turn a buzzer on?
[ ] By breaking the circuit
[x] By completing the circuit
[ ] By removing the bulb
[ ] By removing the battery
When a switch is turned on the circuit is complete so electricity can flow through and the buzzer gets some power
9. Which component in a circuit causes something to turn?
[ ] Bulb
[ ] Wire
[ ] Buzzer
[x] Motor
Motors are found inside remote control cars for example
10. How can you make a bulb brighter in a circuit?
[ ] Add another motor
[x] Add another battery
[ ] Remove the battery
[ ] Use a bigger bulb
The more power, the brighter the bulb