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Magnets Ch. 18 1. p454 Today any material that attracts iron or materials containing iron is called a ________. 2. p454 The parts of a magnet where the magnetic effects are strongest are called _______. 3. p454 The magnetic effects are strongest near the ______ of the bar magnet. 4. p 455 The force of repulsion or attraction between the poles of magnets is called the _____. 5. p 456 A ________ _________ exists in the region around a magnet in which magnetic force can act. 6. p456 The atoms in a _____ are arranged so that the north and south poles of all the atoms ____ line up and create a strong magnetic _______. 7. p457 A magnet can be made from an unmagnetized object made of iron, cobalt, or nickel by _________ the domains in the object. 8. p458 When you cut a magnet in half, you end up with ______ magnets, each with its own ______ pole and _______ pole. 9. p458 Magnets made with these metals have strong magnetic properties and are called ____________. 10. p458An ___________________ is a magnet usually with an iron core, produced by an electric current. 11. p459 In fact, Earth behaves as if it has a _______ _______ running through its center. 12. p460 So a compass needle points to the north because its north pole is attracted to a very large magnetic ________ ________. 13. p463 Oersted concluded that an electric current produces a ________ field and that the direction of the magnetic filed depends on the direction of the __________. 14. p463 A _____________ is a coil of wire that produces a magnetic fdield when carrying an electric current. 15. p464 A ________________ is a magnet that consists of a solenoid wrapped around an iron core. 16. p464 Electromagnets attract objects containing iron only when a _______ exists in the wire. 17. p466 An _________ ________ is a device that changes electrical energy into _________ energy. 18. p469 The process by which an electric current is produced by a changing magnetic field is called ____________________ ____________________. 19. p470 A _____________ is a device that uses electromagnetic induction to convert ________ energy into _________________ energy. 20. p 470 What are the three parts of a Simple Generator?