WHAT MAKES A NATURAL MAGNET (LADESONE)?
Bacteria that need iron in their diet convert to magnetite that make the stones magnetic. BACK TO TOP WHAT MAKES THE EARTH’S MAGNETIC FIELD? The earth is a giant magnet with two magnetic poles. These poles continuously shift and are close to the geographic poles. They move 15km per year to the geographic North Pole. The earth has a highly conductive solid inner core of iron with a radius of 1280 km wide. This is heavier than the moon. It has a temperature up to 5000degrees centigrade. The outer core is 2000 km thick and is covered by rock in state of fusion. The rock is covered by marble of 2800km thickness and a crust only 40 km thick. The external core is in a state of fusion. This core spins slightly faster than the earth itself. The earth’s magnetic field was 1.0 gauss in 1500AD. Now it is 0.5 gauss. It has decreased 90% over the last 4000 years. The magnetic field decreased 5% each 100 years and may disappear within 2000 years. This field continuously affects plants, animals and h
