Question

how do you prove that earth itself is a magnet

Answer 1

it attracts all things towards it with the help of gravity force,and when it revolves we can not fall from it because it attracts us.

Answer 2

Answer:

The crust of earth has some permanent magnetization,and the earth's core generates its own magnetic field, sustaining the main part of the field measure at the surface. So we could say that the earth is, therefore,a "magnet"