2. 1.Plastic is a conductor because it lets a current flow through it. 2.Plastic is an insulator because it lets a current flow through it. 3.Metals are conductors because they let a current flow through them. 4.Metals are insulators because they let a current flow through them. 1. Which of these statements is true? Response Grid

3. 2. What do these symbols show? 1.a cell and a bulb 2.a cell and a switch 3.a bulb and a switch 4.a switch and a motor Response Grid

4. 3. Which instrument would you use to measure current? 1.an ammeter 2.a cell 3.a motor 4.a voltmeter Response Grid

5. 4. How big would the current be at X, Y and Z? 1.It would be biggest at X and smallest at Z. 2.It would be biggest at Z and smallest at X. 3.There would be no current at Y. 4.It would be the same at all three places. Response Grid

6. 5. You can make the current in a circuit smaller by: 1.putting a switch in the circuit. 2.putting more bulbs in the circuit. 3.taking some bulbs out of the circuit. 4.putting more cells in the circuit. Response Grid

7. 6. Resistance is a way of saying: 1.how much current is flowing. 2.how hard it is for a current to flow. 3.how many cells are in a circuit. 4.how many switches are in a circuit. Response Grid

8. 7. Current is: 1.a source of energy. 2.a kind of liquid inside the wires. 3.tiny particles called electrons flowing through the wires. 4.tiny particles called atoms flowing through the wires. Response Grid

9. 8. A long wire: 1.has a smaller resistance than a short wire. 2.has the same resistance as a short wire. 3.has a bigger resistance than a short wire. 4.does not have resistance. Response Grid

10. 9. Which of these circuits are parallel circuits? 1.X and Y only 2.X and Z only 3.Y and Z only 4.all of them Response Grid

11. 10. Which switches must be pressed to make bulb X come on? 1.1 and 2 only 2.1 and 3 only 3.2 and 3 only 4.all three of them Response Grid

12. 11. Parallel circuits are used for house lights: 1.so they can all be switched on and off together. 2.so you know when one breaks, because all the others go off. 3.so they use a bigger current. 4.so they can all be switched on and off separately. Response Grid

13. 12. Which of these statements is not true? (assuming identical components) 1.The currents at Q and R add up to give the current at S. 2.The current is the same at P and S. 3.The current is the same at Q and R. 4.The current is the same at P and Q. Response Grid

14. 13. When current flows through wires: 1.they melt. 2.they get cold. 3.they get hot. 4.nothing changes. Response Grid

15. 1.a metal strip that bends when it is hot. 2.a piece of wire that melts when it gets too hot. 3.a piece of plastic that does not let current through. 4.the part of a plug that sticks into a socket. 14. A fuse is: Response Grid

16. 15. An electric heater has a current of 10 A flowing through it. Which fuse should be used? 1.3 A 2.5 A 3.13 A 4.30 A Response Grid

17. 16. A fuse is used to: 1.heat things. 2.make things move. 3.control the temperature of something. 4.stop current flowing if something is wrong. Response Grid

18. 17. Messages are carried in our bodies by: 1.blood 2.bones. 3.nerves 4.skin. Response Grid

19. 18. If you touch electrical equipment with wet hands: 1.you might damage the equipment. 2.you could get an electrical shock. 3.you might get your hands dirty. 4.you might make the equipment dirty. Response Grid

20. 19. What happens if a large electrical current flows through your body? 1.Your heart could stop working. 2.Your eyeballs could explode. 3.Nothing at all. 4.It will improve your circulation. Response Grid

21. 20. What is a pacemaker? 1.An electrical device that keeps the heart beating regularly. 2.Someone who helps you run at the right speed in a race. 3.A machine to measure the length of your stride. 4.A computer game. Response Grid

22. Participant Scores 16Olamide Sholotan 16Oliver Tate 16Ziad Dakhil 16Clara Sanchez-Cane 16Nicole Eulderink