more+about+magnets

|| N S Look at the magnet above. It is called a bar magnet. It has two ends. The end labeled N means north. The end labeled S means south. These two ends are the //**magnetic poles**//. The force of a magnet is strongest at the poles. If you tie a string to the middle of a bar magnet, the north end will point north and the south end will point south. The earth is like a giant magnet! The magnetic fields surrounding earth are near the North Pole and the South Pole. That is why the poles or ends of a bar magnet are called north and south. Look at the magnets below. The south pole of a magnet attracts the north pole of another magnet. || **N** || **S**
 * //Magnetism//** is a force all around us. It cannot be seen but the way it acts can be seen. //**Magnets**// exert a force of attraction on anything made of iron. Anything made of iron will be attracted to a magnet. A magnet will often not attract things that are not made of, or do not contain iron. However, scientist have developed and discovered materials that are non-ferrous (no iron) that will act as magnets and be attracted to magnets.
 * S**
 * **N** [[image:http://www.myschoolhouse.com/courses/c/2/Images/gr.rect.gif align="center" caption="Magnet attraction"]]
 * S** ||
 * [[image:http://www.myschoolhouse.com/courses/c/2/Images/rtarrow.gif]] ||  || [[image:http://www.myschoolhouse.com/courses/c/2/Images/3.lfarrow.gif]] ||
 * Unlike poles attract ||
 * //Repel//** means "push away" or "push apart." Look at the magnets below. The north pole of the magnet repels the north pole of the other magnet.
 * N**
 * **N** [[image:http://www.myschoolhouse.com/courses/c/2/Images/gr.rect.gif align="center" caption="Magnets repel"]]
 * S** ||
 * [[image:http://www.myschoolhouse.com/courses/c/2/Images/3.lfarrow.gif]] ||  || [[image:http://www.myschoolhouse.com/courses/c/2/Images/rtarrow.gif]] ||
 * Like poles repel ||