Earth, inside and out.
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Earth's magnetic field exists because of the movement of the dynamo inside the Earth. It creates a feedback loop creating both an electric field in the crust and a magnetic field around the planet. The field protects Earth from harmful radiation emitted by the Sun. At the poles, some of that radiation gets pulled in. Remember, magnets are strongest at the poles. This creates the Aurora effect.
MAGNETIC STORM
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In class we watched a documentary about Earth's magnetic field. The questions are available above and if you wish to watch it again or if you missed any of it, here is a youtube link. Click on the picture to the left and it will redirect you to the movie or cut and paste the URL below in your browser. Enjoy.
http://www.youtube.com/watch?v=NJUTUFAWfEY
http://www.youtube.com/watch?v=NJUTUFAWfEY