Question

MEDAL AND FAN!!!
What causes the earth’s magnetic field?
A.
the mineral composition of the earth’s crust
B.
magnetic particles located at the earth’s poles
C.
currents in the earth’s liquid-metal outer core
D.
molten material in the mantle

Answer 1

No one knows for sure, but there is a working theory currently making the rounds. The Earth's core is thought to consist largely of molten iron (red). But at the very core, the pressure is so great that this super hot iron crystallizes into a solid. Convection caused by heat radiating from the core, along with the rotation of the Earth, causes the liquid iron to move in a rotational pattern. It is believed that these rotational forces in the liquid iron layer lead to weak magnetic forces around the axis of spin.

Answer 2

So, the answer is C. currents in the earth’s liquid-metal outer core

Answer 3

yah its C,

Answer 4

Thank you both!