1. Chapters 7 & 8 Review

2.

• The net accumulation of electric charges on an object.

• Exerts a force on anything that has an electric charge.

• Stronger; weaker

• 4. Material that allows electrons to move easily through it.

• 5. A material that doesnt allow electrons to move easily through it.

3.

• Insulator

• A device containing 2 suspended metal leaves in a jar that move apart when charged

• Power source that generates electric current by a chemical reaction it uses a pasty electrolyte. Ex: Battery

4.

• 9. Power source that generates an electric current by a chemical reactionit uses a liquid electrolyte.

• 10. States that potential difference equals current times the resistance.

• 11. V = I x R

• 12. On board

5.

• 13. The difference in potential between two different places. (voltage)

• V; volts

• Flow of electrons through a wire or any conductor.

• I; amp

6.

• 17. The tendency for a material to oppose the flow of electrons.

• 18. R ; ohms or

• 19. A closed path through which electrons can flow.

• 20. Series and Parallel

7.

• 21. Series

• 22. Parallel

• 23. Parallel

• 24. The rate at which electrical energy is converted to another form of energy.

• 25. P = I x V

• 26. On Board

8.

• 27. P ; watts or kilowatts

• 28. I ; amps

• 29. V ; volts

• . 1000 ; 1

• 31. E = P x t

• 32. On board

• 33. E ; kilowatt-hr (kWh)

• 34. P ; kilowatt

9.

• t ; hr

• The properties and interactions of magnets.

• attract; repel; repel

• The interaction between 2 magnets.

• increases

10.

• 40. All magnets are surrounded by a magnetic field that exerts the magnetic force.

• Poles

• Group of atoms with aligned magnetic poles.

• Ex: Iron, nickel and cobalt

• 43. North; south

11.

• 44. Magnets that will never lose its magnetism.

• 45. Magnets that will lose its magnetism through time or dropping.

• 46. A temporary magnet made by placing a piece of iron inside a current-carrying coil of wire.

12.

• 47. Devices that use an electromagnet to measure electric current.

• 48. Produce electric current by rotating a coil of wire in a magnetic field.

• 49. AC and DC

• 50. Direct Current- current flows in only one direction through a wire.

• Ex: battery

13.

• 51. Alternating Current- reverses the direction of the current flow in a regular way.

• Ex: wall outlet

• 52. Device that increases or decreases the voltage of an AC. It decreases the voltage to 120V before it enters your house.