Grade 2 Science Worksheet (Age 8) — Electricity: Circuits, Safety, Motors & Buzzers — Cambridge Syllabus — 60 Questions

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Instructions

Read each question carefully. Answer all the questions in each part to the best of your ability. For drawing questions, you can describe it with words or draw in the space provided.

Part A: Objective Questions

Circle the correct answer for questions 1-10.

  1. Which of these needs electricity to work?
    1. Book
    2. Lamp
    3. Ball
  2. Where does the electricity in a torch come from?
    1. The sun
    2. Batteries
    3. Water
  3. What part of a circuit can turn a light on and off?
    1. Wire
    2. Bulb
    3. Switch
  4. Which material lets electricity pass through it easily?
    1. Metal
    2. Wood
    3. Plastic
  5. What is a rule for staying safe with electricity?
    1. Fly kites near power lines
    2. Touch sockets with wet hands
    3. Never poke things into a socket
  6. A complete path for electricity is called a...
    1. line
    2. circle
    3. circuit
  7. What does a motor do in a circuit?
    1. Makes light
    2. Makes sound
    3. Makes things spin
  8. Which of these is a source of mains electricity?
    1. A battery
    2. A wall socket
    3. A lemon
  9. What does a buzzer do in a circuit?
    1. It spins
    2. It makes a buzzing sound
    3. It lights up
  10. Wires in a circuit are usually covered in...
    1. metal
    2. plastic
    3. paper

Write 'True' or 'False' for questions 11-20.

  1. It is safe to use a toaster near a sink full of water. __________
  2. A circuit must be a complete loop for electricity to flow. __________
  3. A switch opens a circuit to turn something off. __________
  4. Wood is a good conductor of electricity. __________
  5. Batteries have a positive (+) and a negative (-) end. __________
  6. A motor and a buzzer do the same job in a circuit. __________
  7. You should always pull a plug out by the cord, not the plug itself. __________
  8. Mains electricity is more powerful than battery electricity. __________
  9. A bulb will light up if there is a gap in the circuit. __________
  10. A closed switch lets electricity flow. __________

Fill in the blanks for questions 21-30 using the words from the box.

battery    circuit    switch    wires    motor    electricity    safe    buzzer    bulb    flow
  1. A _______________ provides power in a simple circuit.
  2. We use a _______________ to turn a light on or off.
  3. _______________ carry electricity from the battery to the bulb.
  4. A complete path for electricity is called a _______________.
  5. A _______________ will make a buzzing noise when the circuit is complete.
  6. To make a toy car's wheels spin, you would use a _______________.
  7. A light _______________ shines when electricity passes through it.
  8. We must be very _______________ when using electricity.
  9. _______________ is a type of energy that can power things.
  10. When a switch is closed, it allows electricity to _______________.

Part B: Short Answer Questions

  1. Name two things in your kitchen that use mains electricity.
    ____________________, ____________________
  2. Name two things that use batteries.
    ____________________, ____________________
  3. What is the job of a battery in a circuit?
    __________________________________________________
  4. What is the job of the wires in a circuit?
    __________________________________________________
  5. What happens when you close a switch in a circuit with a bulb?
    __________________________________________________
  6. What happens when you open a switch in a circuit with a bulb?
    __________________________________________________
  7. Why are electrical wires covered in plastic?
    __________________________________________________
  8. In the space below, draw a simple circuit with one battery, one switch, and one bulb that is switched on.




  9. Why should you not touch electrical sockets with wet hands?
    __________________________________________________
  10. What are the two main sources of electricity we use?
    ____________________ and ____________________
  11. Look at this list: metal spoon, plastic ruler, rubber toy, paper clip. Which two items would let electricity pass through them?
    ____________________, ____________________
  12. What sound does a buzzer make?
    __________________________________________________
  13. What movement does a motor make?
    __________________________________________________
  14. What does the symbol (+) on a battery mean?
    __________________________________________________
  15. If a wire is broken in a circuit, what will happen to the bulb?
    __________________________________________________
  16. Name one safety rule for using electricity at home.
    __________________________________________________
  17. What is the difference between what a motor and a bulb do in a circuit?
    __________________________________________________
  18. Where does mains electricity come into our homes from?
    __________________________________________________
  19. Can a circuit work with only a battery and a bulb (no wires)? Why or why not?
    __________________________________________________
  20. What is a "conductor"?
    __________________________________________________

Part C: Problem Solving

Use the diagram key below to answer the questions.

KEY:
[BATTERY + -]  = Battery
---WIRE---     = Wire
{BULB}         = Bulb
(SWITCH-OPEN)  = An open switch (off)
(SWITCH-CLOSED)= A closed switch (on)
((BUZZER))     = Buzzer
<<MOTOR>>      = Motor
  1. Look at this circuit: [BATTERY + -] --- {BULB} --- [BATTERY + -]
    What is wrong with this circuit?
    __________________________________________________
  2. Look at this incomplete circuit: [BATTERY + -] ---WIRE--- {BULB}
    What is missing to make this a complete circuit?
    __________________________________________________
  3. Circuit Diagram: A wire connects a [BATTERY + -] to an (SWITCH-OPEN), which connects to a {BULB}, which is connected back to the battery with another wire.
    Will the bulb light up? Why or why not?
    __________________________________________________
  4. Using the circuit from question 3, what one thing do you need to do to make the bulb light up?
    __________________________________________________
  5. You have a circuit with one battery and one bulb. The bulb is dim. What could you add to make the bulb brighter?
    __________________________________________________
  6. Circuit Diagram: A wire connects a [BATTERY + -] to a <<MOTOR>>, which connects to a (SWITCH-CLOSED), which is connected back to the battery with another wire.
    Will the motor spin? Explain your answer.
    __________________________________________________
  7. You build the circuit from question 6, but the motor doesn't spin. Name two things you should check.
    ____________________, ____________________
  8. You want to build a circuit that makes a noise for an alarm. Besides wires and a switch, which two parts must you have?
    ____________________ and ____________________
  9. Look at this circuit: A wire connects a [BATTERY + -] to a {BULB}, which connects to an ((BUZZER)), which is connected back to the battery with a wire.
    What will happen in this circuit?
    __________________________________________________
  10. A toy fan has stopped working. It has a battery, a switch, and a motor. The switch is on. What is the most likely reason it has stopped working?
    __________________________________________________



Answer Key

Part A: Objective Questions

  1. b) Lamp
  2. b) Batteries
  3. c) Switch
  4. a) Metal
  5. c) Never poke things into a socket
  6. c) circuit
  7. c) Makes things spin
  8. b) A wall socket
  9. b) It makes a buzzing sound
  10. b) plastic
  11. False
  12. True
  13. True
  14. False
  15. True
  16. False
  17. False
  18. True
  19. False
  20. True
  21. battery
  22. switch
  23. wires
  24. circuit
  25. buzzer
  26. motor
  27. bulb
  28. safe
  29. Electricity
  30. flow

Part B: Short Answer Questions (Sample answers, other similar answers are acceptable)

  1. Toaster, Kettle, Fridge, Microwave
  2. Remote control, Torch, Toy car
  3. To provide power/electricity.
  4. To carry the electricity around the circuit.
  5. The bulb will turn on/light up.
  6. The bulb will turn off.
  7. To keep us safe from the electricity inside. Plastic is an insulator.
  8. (The drawing should show a loop containing symbols for a battery, a closed switch, and a bulb, all connected by lines representing wires).
  9. Because water is a conductor and you could get an electric shock.
  10. Mains and batteries.
  11. metal spoon, paper clip
  12. A buzzing sound.
  13. A spinning or turning movement.
  14. The positive terminal/end.
  15. It will not light up.
  16. Do not put things in sockets / Do not use electrical items with wet hands / Ask an adult for help.
  17. A motor makes things spin, and a bulb makes light.
  18. From power stations through power lines and cables.
  19. No, because there is no path for the electricity to travel from the battery to the bulb and back.
  20. A material that lets electricity pass through it easily.

Part C: Problem Solving

  1. There are two batteries and no wires to connect them in a loop. / It's not a complete circuit.
  2. A wire is missing to connect the bulb back to the battery.
  3. No, because the switch is open, which creates a gap in the circuit.
  4. Close the switch.
  5. Add another battery.
  6. Yes, because it is a complete circuit and the switch is closed, allowing electricity to flow.
  7. Check that the wires are connected properly. Check if the battery is new/working.
  8. A battery and a buzzer.
  9. The bulb will light up and the buzzer will make a sound.
  10. The battery is dead/has run out of power.
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