When the north pole becomes the south pole.
Because of the difference/wavering in the earths magnetic field due to thwe fact the inner core is largely Iron....
For one, the magnetic field changes continuously; this is not consistent with a permanent magnet.
i dont know its aload of bumf go away :p
Magnetic freild
Magnetic field
Tesla was a very important scientist and he said the magnetic field theory. It was a very significant theory and today we all know about the magnetic fields. A pop band has also used this name too.
The stronger the magnetic field is.
Scientists can identify when a magnetic reversal happened by studying the magnetic orientation of rocks. This is possible because magnetic minerals in rocks align themselves with the Earth's magnetic field at the time the rock forms. By analyzing the orientation of these minerals in ancient rocks, scientists can determine when a magnetic reversal occurred.
Reversals of the Earth's magnetic field were first discovered through studies of magnetized minerals in rocks that record the orientation of the ancient magnetic field. By examining these rocks, scientists found patterns of magnetic stripes on the ocean floor that indicated periods of magnetic field reversals over Earth's history. These findings were further supported by evidence from deep-sea sediment cores and volcanic rocks.
a liquid outer core like Earth, which generates its magnetic field through a process called the geodynamo. Without a magnetic field, the moon lacks protection from solar wind and cosmic rays, which may explain its lack of atmosphere and surface water.
A compass.
The compass needle is then showing to the opposite direction. However not only will this confuse explorers, but birds and animals to. Some animals navigate using the earths magnetic field. BUT you may think life will just die, it won't. Animals and life and survived before so there is no reason it wont. Also the only problem is that it could mess up the magnetic field, and stop the earths magnetic field blocking the suns harmful rays. Many people mistakenly think that the magnetic field protects the surface from cosmic rays, but it is mostly the atmosphere that does that. When the field switches, the magnetic field gets very low, and intense cosmic rays reach the top of the atmosphere (instead of being deflected by the magnetism), but only a few percent increase is measured at the Earth's surface. (At the North Magnetic Pole there is never any shielding, and that is how much stronger the surface cosmic rays are.) Some birds and protozoa that use the magnetic field for navigation would be disoriented. And our compasses would be useless until the field settled down in its reverse direction. The last recorded switch was about 790,000 years ago.