1) What force did the motor use to spin the straw in our motor experiment? a) magnetic force b) internal force c) external force d) gravity 2) How is the Earth like a magnet? a) they both have two poles b) they both have an iron core c) they both have a magnetic field d) All of the above 3) The magnet's two poles are called the a) south and west poles b) north and east poles c) east and west poles d) north and south poles 4) The push or pull of an object is called a) force b) attract c) pole d) fighting 5) When different poles are facing each other, this force _______ the magnets. a) attracts b) repels 6) When similar poles face each other, this force _________the magnets. a) repels b) attracts 7) The place where magnetism is the strongest is called the __________. a) force b) lodestone c) pole 8) The region around a magnet in which a magnetic force is exerted. a) magnetic field b) compass c) repel d) attract 9) An object made of iron, nickel, cobalt, or a mixture of those materials. a) magnetic pole b) magnet c) magnetism d) electromagnet 10) A device that determines the presence of a magnetic field and its direction a) electromagnet b) compass c) magnet d) magnetic pole 11) to push away a) attract b) repel c) magnetic pole d) electromagnet 12) An iron core that is surrounded by a coil of insulated wire. When an electric current passes through the coil, the core becomes a magnet. a) magnetism b) magnetic field c) magnetic pole d) electromagnet 13) An invisible force that attracts most materials made of iron, nickel, or cobalt a) magnetism b) magnet c) repel d) attract 14) The region where a magnet produces a force a) magnetic field b) magnetic pole c) magnetism d) compass

Magnet Test

列印
嵌入

排行榜

視覺風格

選項

切換範本

恢復自動保存: ?