Answer:
•The past magnetic field is recorded mostly by strongly magnetic minerals, particularly iron oxides such as magnetite, that can carry a permanent magnetic moment.
•The rotation of the Earth causes the buoyant fluid to rise in curved trajectories, which generate new magnetic field by twisting and shearing the existing magnetic field. ... Occasionally, however, the dipole part of the field reverses, causing the locations of the north and south magnetic poles to switch.
Explanation:
Read more: The north pole is moving and if it flips, life on Earth is in trouble. When the magnetic field weakens, more cosmic rays enter the atmosphere and transform certain atoms into radioactive carbon-14, raising levels of this isotope.
