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1. Chapter Resources Click on one of the following icons to go to that resource. glencoe.com Image Bank Foldables Video Clips and Animations Chapter Summary Chapter Review Questions Standardized Test Practice

2. glencoe.com

3. Image Bank Click on individual thumbnail images to view larger versions.

4. Image Bank Transfer Images • To transfer images to your own power point follow the following steps: • Open the “Resource” file from the CD-ROM disc – view the file in the “normal view” or “slide sorter view” mode - go to slide #2 – from there you can click through the images and follow these instructions. Click once on the image. • Copy the image • Go to your own power point document • Paste the image.

5. Image Bank Electricity

6. Image Bank Van der Graaf Generator

7. Image Bank Ions Move in Solutions

8. Image Bank Electric Forces

9. Image Bank Electric Field

10. Image Bank Insulators and Conductors

11. Image Bank Electrical Wires

12. Image Bank Lightning Rod

13. Image Bank A Model for a Simple Circuit

14. Image Bank Various Batteries

15. Image Bank Alkaline Battery

16. Image Bank Resistance

17. Image Bank Electrical Wiring

18. Image Bank Resistance of Wires

19. Image Bank Light Bulb

20. Image Bank Controlling the Current

21. Image Bank Fuses

22. Image Bank Table – Power Used by Common Appliances

23. Image Bank Outside Electric Meter

24. Image Bank Table – Preventing Electric Shock

25. Image Bank Table – Electric Shock

26. Image Bank Lightning Bolt Striking the Ground

27. Foldables Electricity Make the following Foldable to help you understand the terms electric charge, electric current, and electric circuit.

28. Foldables Fold the top of a vertical piece of paper down and the bottom up to divide the paper into thirds.

29. Foldables Turn the paper horizontally; unfold and label the three columns as shown.

30. Foldables Read and Write Before you read the chapter, write a definition of electric charge, electric current, and electric circuit in the appropriate column. As you read the chapter, correct your definition and add additional information about each term.

31. Video Clips

32. Video Clips

33. Reviewing Main Ideas 1 Electric Charge • The two types of electric charge are positive and negative. Like charges repel and unlike charges attract. • An object becomes negatively charged if it gains electrons and positively charged if it loses electrons.

34. Reviewing Main Ideas 1 Electric Charge • Electrically charged objects have an electric field surrounding them and exert electric forces on one another. • Electrons can move easily in conductors, but not so easily in insulators.

35. Reviewing Main Ideas 2 Electric Current • Electric current is the flow of charges—usually either electrons or ions. • The energy carried by the current in a circuit increases as the voltage in the circuit increases.

36. Reviewing Main Ideas 2 Electric Current • In a battery, chemical reactions provide the energy that causes electrons to flow in a circuit. • As electrons flow in a circuit, some of their electrical energy is lost due to resistance in the circuit.

37. Reviewing Main Ideas 3 Electric Circuits • In an electric circuit, the voltage, current, and resistance are related by Ohm’s law. • The two basic kinds of electric circuits are parallel circuits and series circuits. • The rate at which electric devices use electrical energy is the electric power used by the device.

38. Chapter Review Question 1 Three lightbulbs are wired in an electric circuit. When one lightbulb is removed from the circuit, the other two lightbulbs continue to glow. This circuit is an example of what type of circuit? A. damaged string of lights B. parallel circuit C. insulator D. series circuit PS 4.4e

39. Chapter Review Answer The circuit is an example of a parallel circuit. The lightbulb that was removed was wired in parallel with the other two lightbulbs. Removing that bulb did not break the flow of current into the other two lightbulbs because there was more than one path for current to follow.

40. Chapter Review Question 2 What is the purpose of a fuse or circuit breaker in a household electric circuit? Answer A fuse or a circuit breaker limits the amount of current that can flow in a circuit. This keeps the wires in the household circuit from becoming hot enough to cause a fire. PS 5.2b

41. Chapter Review Question 3 The rate at which electrical energy is converted into other forms of energy is known as _______. Answer The answer is electric power. This quantity can be calculated using P = IV. PS 4.4d

42. Chapter Review Question 4 The amount of electrical energy equal to using 1 kW of power continuously for 1 hr is called what? Answer The answer is one kilowatt-hour. This is written as 1 kWh. PS 4.4d

43. Chapter Review Question 5 A(n) _____ occurs when static charge moves quickly from one object to another. A. series circuit B. electric discharge C. induced charge D. electric resistance PS 4.4

44. Chapter Review Answer The answer is B. A spark is an example of an electric discharge.

45. Standardized Test Practice Question 1 The separation of positive and negative charges due to an electric field is called a(n) _______. A. transfer of charge B. induced charge C. electric discharge D. electric current PS 4.4f

46. ANSWER: B. The doorknob in the figure has an induced charge because the electric field around excess negative charges on the hand repel negative charges on the doorknob. Standardized Test Practice Answer

47. Standardized Test Practice Question 2 Substances in which electrons do NOT move easily, such as rubber and glass, are known as _________. A. conductors B. metals C. insulators D. lightning rods PS 4.4

48. Standardized Test Practice Answer The answer is C. The opposite of an insulator is a conductor.

49. Standardized Test Practice Question 3 What is being illustrated in this figure? A. electric current B. parallel circuit C. series circuit D. voltage PS 4.4e

50. Standardized Test Practice Answer The answer is C. In a series circuit there is only one path for electric current to follow.