Science 4 · Unit 6: Electricity · Cambridge Primary Science Stage 4

Questions

1. 1. Which of these is a component of a circuit?

   • a pencil
   • a cell
   • a cork
   • a ruler
   Check

2. 2. Which list names the components in this circuit?

   • one cell, a buzzer and wires
   • a switch and one lamp
   • two cells, a switch, two lamps and wires
   • two cells and a motor
   Check

3. 3. What must you do to the circuit before the lamps light up?

   • take out a cell
   • close the switch
   • open the switch
   • take out a lamp
   Check

4. 4. You add another lamp to the circuit. Do the lamps glow more brightly or less brightly?

   • more brightly
   • less brightly
   Check

5. 5. Why do the lamps glow less brightly when you add another lamp?

   • The same cells have to push electricity through more lamps.
   • The new lamp takes all the electricity.
   • The switch is open.
   • The wires get shorter.
   Check

6. 6. You remove a lamp from the circuit. Do the remaining lamps glow more brightly or less brightly?

   • more brightly
   • less brightly
   Check

7. 7. You remove a cell from the circuit. Do the lamps glow more brightly or less brightly?

   • more brightly
   • less brightly
   Check

8. 8. You add a cell to the circuit. Do the lamps glow more brightly or less brightly?

   • more brightly
   • less brightly
   Check

9. 9. To make a circuit with a 3 V battery, two lamps and a switch, which things do you need?

   • two cells, cable, two lamps and a switch
   • one cell, two lamps and a cutter
   • three cells, cable and scissors
   • scissors, sticky tape and a rubber
   Check

10. 10. Each cell is 1.5 V. How many cells make a 3 V battery?

    • 4
    • 3
    • 1
    • 2
    Check

11. 11. How do you make a 3 V battery from 1.5 V cells?

    • Join two cells end to end, + to −.
    • Join two cells + to +.
    • Use one cell and a switch.
    • Join three cells side by side.
    Check

12. 12. You build the circuit with a 3 V battery, two lamps and a closed switch. Will the lamps come on?

    • Yes
    • No
    Check

13. 13. What happens if you remove one lamp from your two-lamp circuit and close the gap?

    • Nothing changes.
    • The other lamp goes out.
    • The other lamp glows more brightly.
    • The other lamp glows more dimly.
    Check

14. 14. Why do the remaining lamps glow more brightly when you remove a lamp?

    • The cells get bigger.
    • The switch becomes stronger.
    • The same cells share their energy between fewer lamps.
    • The removed lamp was blocking the light.
    Check

15. 15. What will happen if you add a third lamp to a two-lamp circuit?

    • All the lamps will glow more dimly.
    • Only the new lamp will be dim.
    • All the lamps will glow more brightly.
    • None of the lamps will light.
    Check