Magnets & Stuff
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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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Magnets stuff

Magnets & Stuff

http://www.sharenator.com/Real_life_Superheroes_10_People_with_Incredible_Abilities/#/a134_magnetic-2.html


Today s lesson

Today’s Lesson

  • Magnetic Fields with Quick Class Demonstration

  • Magnetic Domain

  • Class Activity

  • Temporary & Permanent Magnets

  • Class Activity

  • Introduction to Forces Activity


Big hint

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.


Magnetic fields

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?


Magnetic domain

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


Small activity

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.


Magnets in detail

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.


Small activity1

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


Activity continued

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?


Forces activity

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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