Probably very little would change if you either doubled the magnetic field strength, reversed it, or made it zero. If you reversed it, the larger hole might form over the north pole.
UV-C from the Sun makes ozone in the ozone layer, most solar wind (the stuff affected by our magnetic field) does not survive to reach the ozone layer. The poles might retain a bit more ozone into the late spring, with a nearly unmeasureable decrease in overall ozone levels to match.
the earths magnetic signature is a negative polarity signature
No. Earth's magnetic field does not affect its axis of rotation.
The flow of hot rock in earths mantle will stop and Earth's magnetic field will disappear
magnetic field.
iron
It is Earths' "Magnetosphere".
There is no reason to believe that the Earth's magnetic field will change any time soon... or, for that matter, that anything extraordinary is going to happen in 2012.
Yes.
It is made by the movement of the earths core and magma field
The earths magnetic field results from deep in the earths core. Magnetic conduction from within the earths core is believed to be the cause of this.
because it has the hydro electric power to control the earths magnetic field
the earths magnetic signature is a negative polarity signature
earths magnetic field is generated by the circulation of liquid metal.
magnetosphere
It is Earths' "Magnetosphere".
= An effect of the magnetic field is "Van Allen radiation belt" =
No. Earth's magnetic field does not affect its axis of rotation.