GEOLOGY

Detailed explanation-1: -A: A compass needle is attracted by magnet Earth. It always points north because Earth acts as a giant magnet.

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: -Believe it or not, that’s the way it is. Earth’s south magnetic pole is near Earth’s geographic north. Earth’s magnetic north pole is near Earth’s geographic south. That’s why the north pole of a compass points toward north because that’s where Earth’s south magnetic pole is located and they attract.

Detailed explanation-4: -Yes, Earth is basically a giant magnet! An English scientist William Gilbert explained about 400 years ago, Earth behaves like a giant bar magnet with one pole up in the Arctic (near the north pole) and another pole down in Antarctica (near the south pole).

Detailed explanation-5: -From the south magnetic pole to the north magnetic pole, this force has an effect on all magnetized objects, such as the needle of a compass. Under the effect of Earth’s magnetic field, the needle always points toward the north magnetic pole.