2. Magnetism

3. History of Magnetism Magnetism was discovered in Magnesia Greece (which is now Turkey) Magnetism was discovered in Magnesia Greece (which is now Turkey) A mineral in rocks that is magnetic was discovered. This mineral was called magnetite. The name of these rocks are called lodestones. A mineral in rocks that is magnetic was discovered. This mineral was called magnetite. The name of these rocks are called lodestones. Magnetism was discovered in Magnesia Greece (which is now Turkey) Magnetism was discovered in Magnesia Greece (which is now Turkey) A mineral in rocks that is magnetic was discovered. This mineral was called magnetite. The name of these rocks are called lodestones. A mineral in rocks that is magnetic was discovered. This mineral was called magnetite. The name of these rocks are called lodestones.

4. Three Properties of Magnets Allowed to swing freely, one part of a magnet will always point North. Allowed to swing freely, one part of a magnet will always point North. Magnets contain iron and materials that contain iron. Magnets contain iron and materials that contain iron. Magnets attract and repel other magnets. Magnets attract and repel other magnets. Allowed to swing freely, one part of a magnet will always point North. Allowed to swing freely, one part of a magnet will always point North. Magnets contain iron and materials that contain iron. Magnets contain iron and materials that contain iron. Magnets attract and repel other magnets. Magnets attract and repel other magnets.

5. Magnetic Poles All magnets have a North and South Pole. A magnet is the strongest at the poles. All magnets have a North and South Pole. A magnet is the strongest at the poles. Like poles repel each other. Like poles repel each other. Opposite poles attract each other. Opposite poles attract each other. All magnets have a North and South Pole. A magnet is the strongest at the poles. All magnets have a North and South Pole. A magnet is the strongest at the poles. Like poles repel each other. Like poles repel each other. Opposite poles attract each other. Opposite poles attract each other.

6. Magnetic Fields The region around a magnet in which magnetic forces act.

7. Magnetic Earth Earth is compared to a bar magnet because it has a magnetic field and poles

8. Structure of the Atom Spinning electrons produce a magnetic field. This makes the electrons behave like tiny magnets.

9. Magnetic Domains Magnetic domains are groups of atoms that have their magnetic fields aligned. Magnetic domains are groups of atoms that have their magnetic fields aligned. Magnetized materials have their domains arranged in the same direction. Magnetized materials have their domains arranged in the same direction. Magnetic domains are groups of atoms that have their magnetic fields aligned. Magnetic domains are groups of atoms that have their magnetic fields aligned. Magnetized materials have their domains arranged in the same direction. Magnetized materials have their domains arranged in the same direction.

10. Ferromagnetic Materials Ferro comes from ferrum which means iron in Latin. Ferro comes from ferrum which means iron in Latin. Ferromagnetic materials show strong magnetic properties. Ferromagnetic materials show strong magnetic properties. Examples: iron, nickel, cobalt, gadolinium, samarium, neodymium Examples: iron, nickel, cobalt, gadolinium, samarium, neodymium Ferro comes from ferrum which means iron in Latin. Ferro comes from ferrum which means iron in Latin. Ferromagnetic materials show strong magnetic properties. Ferromagnetic materials show strong magnetic properties. Examples: iron, nickel, cobalt, gadolinium, samarium, neodymium Examples: iron, nickel, cobalt, gadolinium, samarium, neodymium

11. Making, Changing, and Destroying Magnets Permanent magnets are made from materials that keep their magnetism. Permanent magnets are made from materials that keep their magnetism. Temporary magnets are made from materials the easily lose their magnetism. Temporary magnets are made from materials the easily lose their magnetism. Heating a magnet, stroking a magnet back and forth with another magnet, and striking/dropping a magnet can destroy its magnetism. Heating a magnet, stroking a magnet back and forth with another magnet, and striking/dropping a magnet can destroy its magnetism. Permanent magnets are made from materials that keep their magnetism. Permanent magnets are made from materials that keep their magnetism. Temporary magnets are made from materials the easily lose their magnetism. Temporary magnets are made from materials the easily lose their magnetism. Heating a magnet, stroking a magnet back and forth with another magnet, and striking/dropping a magnet can destroy its magnetism. Heating a magnet, stroking a magnet back and forth with another magnet, and striking/dropping a magnet can destroy its magnetism.

12. Breaking Magnets If a magnet is broken in two, you end up with two magnets each with a North and South pole. If a magnet is broken in two, you end up with two magnets each with a North and South pole.