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Directions:Read and understand each item carefully.Encircle the correct answer.
1.It refers to invinsible magnetics fields that attract objects made of iron,cobalt,and nickel. A.magnetic field C.force B.magnet D.iron 2.Which of the following materials can attract a magnetic? A.nail C.cloth B.piece of paper D.ruler 3.Magnets are attracted to three types of metals______. A.cobalt,iron,and copper B.iron,nickel,and cobalt C.nickel,aluminum,and ceramic D.ceramic,iron,and stell 4.Which of the statements is correct? A.Magnet has a north pole and south pole B.Magnets do not attract paper clips C.Magnets have visible magnetic fields D.North pole and south pole do not attract each other. 5.Which statement is correct? A.All materials are attracted by magnets. B.Materials made of copper are those attracted by magnets C.Materials which are non-metals are not attracted by magnets. D.One end of the magnet is south,and the opposite end is the east pole.
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