Earth's poles are to switch every few hundred thousand years.
Magnetic Reversal
North and South poles
The phenomenon you're referring to is known as geomagnetic reversal or magnetic pole reversal. This occurs when the Earth's magnetic field flips its polarity, causing the magnetic north and south poles to switch positions.
south
because they are different parts of the earths hemispheres.
This is known as magnetic reversal when earth's magnetic poles change places.
Because the earths magnetic poles move around from year to year, and even day to day.
This has happened several times in the past at irregular intervals, so it seems likely it will happen again in the future.
By the axis of earths rotation
Away from the poles because the air near Earths surface is warm.
Because the middle of the earths surface is the hottest on earth and the equator is right in the middle and the poles is at the end of the earths surfaces
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