GEOLOGY

Detailed explanation-1: -Earth acts as a giant magnet with magnetic poles and a magnetic field over which it exerts magnetic force. Earth has north and south magnetic poles like a bar magnet. Earth’s magnetic poles are not the same as the geographic poles. Earth’s magnetic field is called the magnetosphere.

Detailed explanation-2: -The crust of the Earth has some permanent magnetization, and the Earth’s core generates its own magnetic field, sustaining the main part of the field we measure at the surface. So we could say that the Earth is, therefore, a “magnet."

Detailed explanation-3: -Why is the earth like a magnet? Earth’s magnetic field is mostly caused by electric currents in the liquid outer core, which is composed of conductive, molten iron. Loops of currents in the constantly moving, liquid iron create magnetic fields.

Detailed explanation-4: -Earth has two sets of poles, geographic pole and magnetic poles. Earth’s magnetic field can be visualized if you imagine a large bar magnet inside our planet, roughly aligned with Earth’s axis. Each end of the magnet lies relatively close (about 10 degrees) to the geographic North and South poles.

Detailed explanation-5: -The Earth’s magnetic field is mostly caused by electric currents in the liquid outer core. The Earth’s core is hotter than 1043 K, the Curie point temperature above which the orientations of spins within iron become randomized. Such randomization causes the substance to lose its magnetization.