Magnetic Sphere, Hollow Earth?

[JAMES]

As I watched my Grandson working to construct a sphere using one half inch sized magnets my mind went to a hollow earth. Could this be a model?

 

[DontAskMe]

Yes, it could be a model of a hollow Earth.No, the Earth is not hollow..

 

[te144]

If Earth were hollow, it would have been swallowed by the Sun in its infancy.

 

[Nyx]

No, how the earth is able to generate and maintain a magnetosphere is through the rotation of molten rock about a solid core. It is closer to a dynamo than anything else.http://science.nasa.gov/science-news/science-at-nasa/2003/29dec_magneticfield/http://www.es.ucsc.edu/~glatz/geodynamo.html