It's called a magnetometer.
It changes over time through direction and strength. So therefore Magnetic North becomes Magnetic South.
It is Earths' "Magnetosphere".
Earths magnetic orientation is locked into the rock when the rock cools
Earths geographic North Pole is also currently a magnetic north pole. This is however not always the case because over geological time scales the Earth's magnetic poles flip as a result of changes of flow in Earth's molten core which produces Earth's magnetic field.
magnetosphere
It changes over time through direction and strength. So therefore Magnetic North becomes Magnetic South.
The Earth's magnetic field changes over time because that is the way that God makes it.
A compass is an instrument containing a freely suspended magnetic element which displays the direction of the horizontal component of the Earth's magnetic field at the point of observation.
For one, the magnetic field changes continuously; this is not consistent with a permanent magnet.
The molten iron and medals inside the earths core are the reasons for the earths magnetic core.
It is Earths' "Magnetosphere".
which of the list of rare earths are magnetic
The Earth magnetic field changes approximately every 200,000 thousand years.
the earths magnetic signature is a negative polarity signature
Yes.
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.
Earths magnetic orientation is locked into the rock when the rock cools