TRASH BALL REVIEW

Chapter 20

You and your teammates will each take turns answering review questions.

If correct, your team will earn a point. You also will have a chance to shoot a paper wad into the trash bin for extra points. From the back of the room? (+3) From the six foot marker? (+1)

The winning team will win prizes!

All students must record correct answers and point values in order to win!

RULES OF GAME

1 2 3 4 5 6 7 8 9 10

11 12 13 14 15 16 17 18 19 20

21 22 23 24 25 26 27 28 29 30

31 32 33 34 35

QUESTIONS

QUESTION 1

A material has a net electric charge because it has an excess or shortage of _________________.

QUESTION 2

Which set of charges will repel? Like charges OR opposite charges?

QUESTION 3

Electric field strength depends on the net charge and _____________ from the charge.

Field of a positive charge

QUESTION 4

What is the SI unit for charge?

QUESTION 5

True or False? Doubling one charge doubles the force on both charges.

QUESTION 6

Charges can be transferred by friction, by contact, and by __________________.

QUESTION 7

The image below represents charging by _____________________.

QUESTION 8

Static _______________ occurs when a pathway through which charges can move forms suddenly.

QUESTION 9

The diagram below represents charging through ________________.

QUESTION 10

The study of the behavior of electric charges is called ____________________.

QUESTION 11

The law of conservation of charge states that the total charge in an isolated system is ____________.

QUESTION 12

The continuous flow of electric charge is an electric ______________.

QUESTION 13

What is the SI unit for electric current?

QUESTION 14

What are the two types of current?

QUESTION 15

A material through which electrons flow easily is called an electrical _________________.

QUESTION 16

Wood, plastic, rubber, and air are all examples of good electrical ___________________.

QUESTION 17

The opposition to the flow of charges in a material is called ________________.

QUESTION 18

What is the name for the SI unit of resistance?

QUESTION 19

Which type of wire will produce less resistance? A thin wire OR a thick wire?

QUESTION 20

A material’s thickness, length, and ___________________ affect it’s resistance.

QUESTION 21

As temperature increases, a metal’s resistance increases because electrons ________________ more often.

QUESTION 22

A _________________ is a material that has almost zero resistance when cooled to low temperatures.

QUESTION 23

In order for charge to flow in a conducting wire, the wire must be connected in a complete loop that includes a ______________ of electrical energy.

QUESTION 24

Potential difference is electrical potential energy between two places in an electric ____________.

QUESTION 25

What is another term for potential difference?

QUESTION 26

A device that converts chemical energy to electrical energy is called a _______________.

QUESTION 27

The rate at which electrical energy is converted into another form of energy is called electric _____________________.

QUESTION 28

The following equation is called _________________.

V = I x R

QUESTION 29

What letter in the equation below represents current?

V = I x R

QUESTION 30

Electric power companies usually determine charges on your bill with what unit?

QUESTION 31

Which symbol in the circuit diagram below represents a switch?

A

BC

D

QUESTION 32

What type of circuit is shown in the diagram below? Is it series or parallel?

QUESTION 33

Which safety device has an internal wire that melts when the current becomes to great?

QUESTION 34

True or False: If one light in a series circuit burns out, the remaining lights will still operate.

QUESTION 35

Which safety device is a switch that opens up when the current becomes too great?

ANSWER KEY

1. electrons2. like3. distance4. coulomb5. True6. induction7. contact8. discharge9. induction10. Static

electricity

11. constant12. current13. ampere14. DC & AC15. conductor16. insulators17. resistance18. ohm19. thick20. temperature21. collide

22. superconductor

23. Total internal reflection

24. Diffraction25. Trough26. battery27. power28. Ohm’s Law29. I30. kilowatt-hour

31. A32. parallel33. fuse34. False35. circuit breaker