Magnets: Properties, Uses, and Facts PDF

What do we already know?  Understand that some materials are attracted to magnets  What the characteristics of magnets are  That magnets can repel and attract each other  How magnets behave  What happens when you put two magnets together There are many legends that tell us about...

What do we already know?  Understand that some materials are attracted to magnets  What the characteristics of magnets are  That magnets can repel and attract each other  How magnets behave  What happens when you put two magnets together There are many legends that tell us about the discovery of magnets. One of the most common, is that of an elderly shepherd named Magnets, who was herding his sheep in an area of Northern Greece called Magnesia, about 4,000 years ago. It is said that both the nails in his shoes and the metal tip of his staff became firmly stuck to the large, black rock on which he was standing. This type of rock was later named magnetite, after either wand magnet bar magnet doughnut magnet horseshoe magnet Magnets are in most electronic devices, in fact, anything that has a motor uses a magnet. They are used to Magn ets are slow down roller to keep used coasters and refriger subways. ator do Magn c l o s ed. or s ets a place re ev ns , d in t en i s i o stom h Tele v r s, a nd achs e ut e s to ca of comp ave oven tch m cows w etals! micro rate with e all op ts. e magn More uses of magnets are found every day!  u s u a lly e y a r e They Th i r o n. ha ve o f two e made nds They can calle also ma g d netic repel other poles. n magnets. y c a T h e t a c a t tr e s o m ls. t e r ia ma  Magnet A stone or a piece of metal that attracts some other metal. Attract To pull towards each other. Repel To push away from each other. Poles The ends of a magnet.  E v er y magn et has at lea s t on e n or t h pole a nd o ne s ou t h pole. The blue end of a magnet is usually the south pole. The red end of a magnet is usually the north pole.  When two magnets are close, they create pushing or pulling forces on one another. These forces are strongest at the ends of the magnets. The two ends of a magnet are known as the north pole and the south pole.  So now we know that “like” poles repel each other… and that “opposite” poles attract each other. They do this because there is a FORCE If you try to put two magnets together with the same poles pointing towards one another, the magnets will push away from each other. We say they repel each other. In thi s pic north ture poles two push ing a are each way other from (repe lling other each ).  If you put two magnets together with different poles pointing towards one another, the magnets will pull towards each other. We say they attract each other. In this picture a north and a south pole are pulling towards each other (attracting each other). Magnets can attract other magnets but they can also attract Magnetic magnetic materials are materials. always metals but only a few metals are magnetic.  s o a n y g n e ti c, l b e S m a t w i l Iro n I i r o n in i S te el ta l w i th gn e t. m e o a m a a c t e d t a st e e l attr s i r o n , s o l e , w i l l co n ta i n e x a m p l i p , f o r g n e t. pape r c o a m a a c t e d t be a tt r Most other metals, for example aluminium, copper and gold, are NOT magnetic. An aluminium drinks can, for example, will not be attracted to a magnet. How do magnets help in a scrap yard? A car is made up of many different materials. When a car is scrapped the different types of metals need to be sorted. A huge rotating magnet is used to sort the magnetic materials from the non-magnetic materials. Separating the materials allows them to be reused. magnetism magnet magnetic non-magnetic force poles push pull repel attract north south