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Magnet Study Guide Test on Tuesday, November 24, 2015 Students should know the following information for their magnet test: Magnetic objects include: nail, soup can, paper clip, needle, screw, as well as other metal objects containing iron, nickel, or cobalt. Nonmagnetic objects include: soda can, chalk, wood, eraser, coffee grounds, aluminum foil, penny, rubber band, as well as anything that does not contain iron, nickel, or cobalt. A magnet creates an invisible area of magnetism all around it called a magnetic field. You should never put a magnet near computers, TVs, credit cards, tape recorders, DVD players, tapes, DVDs, or CDs. A compass always points north no matter which direction you are facing. Even if you are walking south, the compass will still point north. The biggest magnet is the Earth. All magnets have a north and south pole. The poles have the most magnetic force and are the strongest part of the magnet. If two opposite poles (N-S or S-N) are facing each other, they will attract. If two like poles (N-N or S-S) are facing each other, they will repel. You can find a natural magnet (magnetite or lodestone) in a cave. Electromagnets are used in junkyards. Some cereals (like Total) are magnetic because they contain 100% of the iron your body needs. As you are studying, think about the experiments we did in class!