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Magnets & Stuff

Magnets & Stuff. http://www.sharenator.com/Real_life_Superheroes_10_People_with_Incredible_Abilities/#/a134_magnetic-2.html. Today’s Lesson. Magnetic Fields with Quick Class Demonstration Magnetic Domain Class Activity Temporary & Permanent Magnets Class Activity

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Magnets & Stuff

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  1. Magnets & Stuff http://www.sharenator.com/Real_life_Superheroes_10_People_with_Incredible_Abilities/#/a134_magnetic-2.html

  2. Today’s Lesson • Magnetic Fields with Quick Class Demonstration • Magnetic Domain • Class Activity • Temporary & Permanent Magnets • Class Activity • Introduction to Forces Activity

  3. Big Hint • When going through a PPT with me, download it from the wiki and save it on your Hard Drive. If there is anything else that I say, write it in the notes. This way it is not lost.

  4. Magnetic Fields • All magnets have a North and South Pole. • This can be seen through a magnetic field, which we will quickly see. • What do you think will happen to a compass if it is brought close to a magnet? • What will happen to a compass if it’s in between the North and South Pole of a Magnet?

  5. Magnetic Domain • All metals that are magnetic have a magnetic domain. • If the atoms are not pointing in the same direction, then the metal will not b very magnetic. • If most/all of the atoms point in the same direction, then it’s magnetic. http://en.wikipedia.org/wiki/File:Dominios.png

  6. Small Activity • In a group of 1 or 2, get a magnet, a nail and a paper clip. • Hold the nail next to the paper clip to make sure it’s not magnetic. If it is, get a new nail. • Your job is now to make a Magnet out of the nail. I’m not telling you how, but it is easy to do!! • Try and get the nail to pick up as many paper clips as possible.

  7. Magnets In Detail • In a magnetized material, all of most of the magnetic domains (direction of magnetism) are arranged in the same direction. • A temporary magnet is a magnet that can easily lose it’s magnetism. • A magnet that keeps it’s magnetism for a long time is called a permanent magnet. • Permanent magnets can be destroyed through being heated or hit hard.

  8. Small Activity • The class needs to get into 3 groups (6 or so students). • Each group will need the following: • 3 wires • A power supply • Magnetizer • Switch • Nail • Very weak magnet with some paperclips

  9. Activity Continued • Put the material together like described and drawn on the board. • First, put the nail in the magnetizer for around 10 seconds (do this by turning on the switch. • See how many paper clips it can pick up (is it stronger than the first magnet we made? • Get the weak magnet and see how many paper clips it can pick up. • Magnetize the magnet for 10 seconds and see how many paper clips it can pick up. Is it more or less?

  10. Forces Activity • We will need to get into groups of 2 or 3 students. You will be working as a group for a couple of lessons so it will be important to choose partners that will do work!!

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