CK-12 Foundation
Ck 12: Physical Science: Earth as a Magnet
[Free Registration/Login may be required to access all resource tools.] Explains how Earth is a magnet, its geographic and magnetic poles, and its magnetic field.
Lawrence Berkeley National Laboratory
Berkeley Lab: Space Applications: Radiation Induced Effects
A brief explanation of radiation belts, or Van Allen belts, in space above the surface of the earth.
Other
Space Weather Center: Our Protective Shield
The Earth's magnetosphere helps shield us from cosmic and solar radiation. This segment offers a great explanation of this abstract concept along with numerous images and diagrams. An interactive game is provided as well.
CK-12 Foundation
Ck 12: Fifth Grade Science: Physical Science: Earth as a Magnet
[Free Registration/Login may be required to access all resource tools.] Looks at the Earth as a magnet and how Earth's magnetism benefits living things.
NASA
Nasa: La Exploracion De La Magnetosfera Terrestre
This site is a general overview of space research on the environment of the Earth in space.
Other
Phy6: La Tierra, El Gran Iman
This site is a general overview of space research on the environment of the Earth in space.