Electricity

Go to this website and read about electricity. Once you have read all three pages answer the following questions. Open a blank word document and type the question number, the letter for the answer and the answer (Example 1. A. Apple). Be sure to type your name and date at the top of the document. 

1. A material that lets electricity pass through it is called ...
   A. an electrical conductor
   B. an electrical insulator
   C. an electrical appliance

2. A material that does NOT let electricity pass through it is called ...
   A. an electrical conductor
   B. an electrical insulator
   C. an electrical appliance

3. Which of the following materials is an electrical conductor?
   A. Silver
   B. Silver-colored plastic
   C. Cork

4. Which of the following materials is an electrical insulator?
   A. Aluminum
   B. Gold
   C. Rubber

5. In which circuit will the bulb or bulbs glow brightest?
   A. A simple circuit with one bulb and one battery
   B. A simple circuit with one bulb and two batteries
   C. A simple circuit with two bulbs and one battery

6. Why is a bulb brighter when it is powered by two batteries rather than one?
   A. Because the flow of electricity in the circuit is less
   B. Because the flow of electricity in the circuit is the same
   C. Because the flow of electricity in the circuit is greater

7. Ruby has connected two bulbs across two batteries in a simple circuit. How can she make the bulbs dimmer?
   A. Replace one of the batteries with a section of wire
   B. Replace one of the batteries with a cork
   C. Replace one of the bulbs with a section of wire

8. Ruby makes a complete simple circuit with one bulb and three batteries. The bulb lights for an instant and then goes out. Why?
   A. Not enough electricity flows around the circuit
   B. Too much electricity flows through the bulb's filament
   C. The batteries are flat

9. Why is electrical wiring usually made from copper?
   A. Because copper is shiny  
   B. Because copper conducts electricity
   C. Because copper is not magnetic

10. Why is electrical wiring usually covered with a layer of plastic?
   A. To make it look pretty
   B. To help electricity flow along the wire
   C. To make it safe