Magnet Notes Must contain nickel, cobalt or iron

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Presentation transcript:

Magnet Notes Must contain nickel, cobalt or iron Magnets have a North Pole and a South Pole Like poles repel Opposite poles attract Objects that are magnetic attract magnets

A magnet that always has magnetic properties is called a permanent or man-made magnet A magnet that is sometimes magnetic but can be turned off and on is called a temporary magnet A magnet that is found in the earth is called a natural magnet

Compass First compass developed in China Contains a magnetized needle A compass points to magnetic north

Electromagnets An electromagnet is a temporary magnet The strength of an electromagnet was most impacted by the number of batteries The more coils the greater the strength Electricity flow controlled by a switch Source of magnetism is electricity (battery)