| 1. Thermal energy that moves from a material at a higher temperature to a material at a lower temperature is ______________. | |
| a) | convention | b) | heat | c) | specific heat | d) | plasma |
| 2. A generator produces __________. | |
| a) | direct current | b) | constant voltage | c) | alternating current | d) | indirect current |
| 3. A _________ is made up of an electric current passing through a single coil of wire. | |
| a) | step-down transformer | b) | step-up transformer | c) | electromagnet | d) | generator |
| 4. Materials that can be magnetized are called ___________ materials. | |
| a) | natural | b) | temporary | c) | ferromagnetic | d) | electromagnetic |
| 5. Tape recorders, TVs, and doorbells all use __________. | |
| a) | generators | b) | electromagnets | c) | permanent magnets | d) | natural magnets |
| 6. A temporary magnet made by wrapping wire into a coil and passing electricity through it is an _________________. | |
| a) | alternating current | b) | unpaired electron | c) | electromagnet | d) | electrocondensor |
| 7. Regions inside a material in which magnetic fields all point in the same direction are ___________. | |
| a) | transformers | b) | domains | c) | ranges | d) | ELFS |
| 8. A spinning electron creates a ___________. | |
| a) | domain | b) | generator | c) | magnetic field | d) | compass |
| 9. A generator develops current by moving a coil past a _________. | |
| a) | direct current | b) | wire | c) | magnet | d) | transformer |
| 10. A ___________ magnet keeps its magnetic quality even when removed from a magnetic field. | |
| a) | temporary | b) | permanent | c) | electronic | d) | alternating |
| 11. Electrical current that continually reverses direction is called _______ current. | |
| a) | alternating | b) | electromagnetic | c) | magnetic | d) | temporary |
| 12. Temperature is a measure of a material's average _______ energy. | |
| a) | kinetic | b) | thermal | c) | potential | d) | heat |
| 13. A __________ measures temperature. | |
| a) | heat engine | b) | thermometer | c) | crystal | d) | radiator |
| 14. Stored energy is __________ energy. | |
| a) | thermal | b) | kinetic | c) | potential | d) | chemical |
| 15. A device that produces an electric current by turning a coil of wire in a magnetic field is an __________. | |
| a) | generator | b) | transformer | c) | electromagnet | d) | ELF |
| 16. A step-up transformer raises the ________ of a current. | |
| a) | voltage | b) | wattage | c) | electromagnetism | d) | frequency |
| 17. The generation of electric current by changing magnetic fields is called __________. | |
| a) | Electromagnetic production | b) | alternating current | c) | transformation | d) | electromagnetic induction |
| 18. A _________ has two coils of wire in which the second coil consists of fewer turns than the first. | |
| a) | step-down transformer | b) | step-up transformer | c) | electromagnet | d) | generator |
| 19. A __________ is a device that raises or lowers the voltage of an alternating current. | |
| a) | transformer | b) | generator | c) | condenser | d) | radiator |
| 20. Current is raised to high voltage for tansmission lines by using __________. | |
| a) | generators | b) | batteries | c) | transformers | d) | electromagnets |
| 21. In a junkyard, electromagnets are used to lift old cars because ___________. | |
| a) | electromagnets are temporary magnets that can be turned off | b) | the wire coil of natural magnets is too large | c) | electromagnets are permanent magnets that will not fail even when lifting the weight of a car | d) | permanent magnets are too large |
| 22. The force that acts between magnets are called _________. | |
| a) | ELF | b) | induction | c) | magnetic drift | d) | magnetism |
| 23. A ___________ has two coils of wire in which the second coil consists of more turns. | |
| a) | step-down transformer | b) | step-up transformer | c) | electromagnet | d) | generator |
| 24. If you are lost in the woods but have a compass, you should __________. | |
| a) | point the compass in the direction you want to go | b) | look at the needle to find which direction is north | c) | point the compass in the direction you think is north | d) | look at the needle to find the nearest ferromagnetic materials |
| 25. In outer space, magnets can be expected __________. | |
| a) | to work because domains will expand with the lack of gravity | b) | to work because magnetic fields exist in all space | c) | not ot work because there is no atmosphere in space | d) | not to work because magnetism depends on gravity |