Question

How does the earth behave like a magnet even though it doesn't have a magnet inside it??​

Answer 1

Null points exist where the field due to the magnet is equal and opposite to the horizontal component of the earth's field.

At the two points marked X in figure, the earth's magnetic field and the magnet's field are exactly equal and opposite and the resultant field is zero. These points are called the null or neutral points.

Answer 2

Explanation:

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On Earth, flowing of liquid metal in the outer core of the planet generates electric currents. The rotation of Earth on its axis causes these electric currents to form a magnetic field which extends around the planet