Naturally magnetic lodestones were found in an area of Greece called Magnesia and by the 1100s, lodestones were used for navigation. In 1269, Petus de Maricourt discovered that magnets have two poles. More »

A compass uses a magnet that points north according to the Earth's natural magnetic field. In many compasses, the indicator is a magnetic needle mounted on a spindle that allows it to swing freely, while in others there ... More »

Curriculums may vary from school to school, but a typical second-grade science curriculum includes units on scientific inquiry, earth science, weather and magnets. Second-grade science students are taught to recognize pa... More »

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Permanent magnets with diminished field strength can be recharged in at least three ways: by striking, stroking or stacking. Each of these methods entails lining up the weakened magnet with a stronger external field and ... More »

Magnetic levitation is a method of supporting an object with the repulsive force of magnets and the stability of servomechanisms. The object is thus suspended in the air, counteracting the effects of gravity. More »

The north and south poles, often called the negative and positive sides, of a magnet are determined by using the directional properties of magnets. The north pole of the magnet is attracted to Earth's geographical north ... More »

In addition to the simple magnets on the refrigerator that hold up photos, coupons or shopping lists, magnets (often electromagnets) are also found in virtually any electric device or appliance with a motor, transformer,... More »