What forms when earths magnetic field changes direction

I know that the earth's magnetic field is due to molten metal and ions flowing in its core. It has been found that the Earth's magnetic field changes its direction and it has even flipped once! But, in order for this to happen the molten ions flowing in the core should also change its direction.

Explanation:

answer they showed that organic molecules such as amino acids could be produced from inoragnic molecules;