1. Double Jeopardy MagnetismInsulators and Conductors CircuitsElectrifying Facts 20 40 60 80 100 Compliments of the James Madison Center, JMU

2. Category 1 – 20 points Why are electrical wires usually covered with plastic or rubber?

3. Category 1 – 40 points The picture below shows magnet 2 being pushed toward magnet 1. Which of the following will most likely happen to magnet 1 as magnet 2 is moved closer? A.Magnet 1 will move under magnet 2. B.Magnet 1 will move toward magnet 2. C.Magnet 1 will move on top of magnet 2. D.Magnet 1 will move away from magnet 2.

4. Category 1 – 60 points Which of the following diagrams shows a magnet being attracted to another magnet? A. C. B. D.

5. Category 1 – 80 points Which of the following metals will be attracted to a magnet? A. copper B. gold C. iron D. silver

6. Category 1 – 100 points Compare and contrast an electromagnet and a regular magnet.

7. Category 2 – 20 points Is a penny a… I a. conductor b. insulator c. resistor

8. Category 2 – 40 points Which of the following is an example of a conductor? glass rubber plastic salt water

9. Category 2 – 60 points A.conductor B.insulator C.resistor Is a plastic game piece a….

10. Category 2 – 80 points How are conductors and insulators different? In your response, give an example of a conductor and an insulator.

11. Category 2 – 100 points Why is an insulator used in a circuit? An insulator helps keep the electric charges inside the pathway. An insulator transforms electrical energy into other forms of energy. An insulator provides the pathway electric current moves through. An insulator provides the energy to pump electric charges through the circuit.

12. Category 3 – 20 points The picture shows an incomplete electrical circuit. Which of the following objects can be connected to the ends of the two wires to make the circuit complete and light the bulb? A. a battery B. a switch C. another bulb D. another wire

13. Category 3 – 40 points Which diagram shows a circuit that will cause the bulb to light? A. B. C. D.

14. Category 3 – 60 points The diagram shows an incomplete circuit due to a break in the wire at point X. Which item will electricity flow through, causing the bulb to light? A. B. C.D.

15. Category 3 – 80 points Choose a circuit and tell why it does/does not work? A C B D

16. Category 3 – 100 points Olivia is building a circuit to make a light bulb light up. Explain what will happen when she adds a rubber band to her circuit.

17. Category 4 – 20 points Which of the following parts of a circuit acts as a resistor?

18. Category 4 – 40 points Choose the word that belongs in the sentence. A circuit with more than one resistor on a single wire is a ______ circuit. series simple multiple complex

19. Category 4 – 60 points A copper wire is wrapped around an iron bar, as shown below. To make the bar an electromagnet, what should Stacie do next? A.connect the wire to a bulb B.heat the wire around the bar C.send a current through the wire D.touch the ends of the wires together

20. Category 4 – 80 points The diagram shows pieces of scrap iron being picked up by a metal disk hanging from a crane. The metal disk is most likely functioning as which of the following? A. a battery B. an engine C. an insulator D. an electromagnet

21. Category 4 – 100 points If three batteries are connected in series to the circuit, which of these shows the proper connection?

22. Category 5 – 20 points A student made the device shown below. This device can best be used as a ________?

23. Category 5 – 40 points A piece of bread is stuck in the toaster pictured below. Which of the following explains why it is unsafe to use a metal fork to remove the piece of bread from the toaster? A. The fork will catch on fire. B. The fork will melt in the toaster. C. The fork will conduct electricity. D. The fork will damage the toaster.

24. Category 5 – 60 points Which of the following statements best explains why magnets usually stick to a refrigerator door? A.The refrigerator door is smooth. B.The refrigerator door contains iron. C.The refrigerator door is a good conductor. D.The refrigerator door has electric wires in it.

25. Category 5 – 80 points A.Pull electric cords form the walls by quickly yanking on them. B.Keep cord-operated appliances away from pools and other water. C.Wear gloves before moving a downed power line away from public areas. D.If electric drill falls into a sink filled with water, turn it off before pulling the cord out. Which step should you take to avoid an electrical shock?

26. Category 5 – 100 points Which of the following would always increase the flow of current through the lights in the circuit shown above? Decreasing the battery voltage and decreasing the resistance of the lights. Increasing the battery voltage and increasing the resistance of the lights. Decreasing the battery voltage and increasing the resistance of the lights. Increasing the battery voltage and decreasing the resistance of the lights.