Chapter 8 Review

1. this is a conductor that can be moved to bridge the gap or not bridge the gap in a circuit
2. the area of magnetic force around a magnet is called the magnetic _____
4. this unit measures the amount of electrical push, or force, in a circuit
7. the magnetic force is the strongest at the ____ of the magnet
10. both magnets and static electricity can ____ and repel objects
14. a coil of wire with a core attached to an electrical source is called an _____
15. this occurs when a circuit and a power source allow electrons to move
17. ______ devices can communicate information, but electrical devices cannot
18. this type of circuit has only one path for the flow of electricity
19. plastic, ____ and glass are good insulators
22. a liquid or paste substance that conducts electricity
23. Thomas Edison revolutionized the use of electricity when he invented the _____
25. this type of electricity is produced when charges build up on the surface of an object

1. This is a material that can work as a conductor or an insulator
3. the strength of an electromagnet can be affected by the size of the ___ of the core or the number of coils around the core
5. He discovered that current traveling through a wire produces a weak magnetic field in the live wire (last name only)
6. a ___ works as a result of a chemical reaction and the movement of electrons
8. integrated circuits signal information by ____ and closing electrical circuits and sequence
9. any material that has the ability to attract iron
11. this unit measures how much current flows through a given part of a circuit in one second
12. he discovered that adding a metal core to a coil of wire increased the magnetism
13. the brain of the computer that tells the other parts of the computer what to do
16. a very small circuit with all the parts built into it
20. a continuous unbroken path through which electricity can flow
21. this type of circuit has multiple paths for the flow of electricity
24. this unit measures power, or how fast work is done