Every magnetized … At the heart of a computer hard drive is a spinning disc with a magnetic surface. How can we determine whether a needle of a compass is magnetized? Magnetism works over a distance. Speakers. Magnetism is an invisible force, caused by the electrons in the atoms that make up everything around us. A magnet is an object that has a magnetic field (an invisible pattern of magnetism). Definition of electromagnetism Electromagnetism is the type of magnetism produced by an electric current. Vogt, Gregory. Magnetism happens when materials exert attractive or repulsive forces on other materials. Magnets can also repel other magnets. Create your account. Did you know that planet Earth is a big magnet? North poles attract the south poles of other magnets, but they repel other north poles. Permanent magnets have persistent magnetic fields caused by ferromagnetism. This causes them to cancel each other out over time. Cobalt, nickel, some rare earth metals, and natural materials like lodestone and magnetite are magnetic too. These regions are called the poles of the magnets. Magnets strongly attract objects that contain iron, steel, nickel, or cobalt. Guess what? The force of magnetism, simply put, is due to the motion of electric charges. Group: Science Science Quizzes : Topic: Magnetism : Share. Magnetism is a force experienced by certain metals. Every magnetic material is a metal, but not every metal is magnetic. More than 2,000 years ago, a type of rock was discovered in a region known as Magnesia in what is modern-day Turkey that attracted iron. Today magnets are specially made. Please note: Text within images is not translated, some features may not work properly after translation, and the translation may not accurately convey the intended meaning. How Do I Use Study.com's Assign Lesson Feature? Magnetism is caused by the motion of electric charges. We need magnetism to produce large amounts of electricity in power stations. Most other materials—for example, water, air, and wood—have very weak magnetic properties. Each atom has electrons, particles that carry electric charges. But if you face the north pole of one magnet toward the north pole of the other magnet, the two poles will actually repel, or push away, from each other. See more ideas about teaching science, science for kids, fun science. 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