What do scientists think happens in the core to produce the Earth's magnetic field? A. The solid inner core of iron and nickel act as a large magnet.

B. The outer liquid core becomes magnetized by the rapid spin of the solid inner core.

C. The liquid iron and nickel outer core's motion in relation to the metallic solid inner core becomes a geodynamo.

A

Explanation: I just took a test about it and A was the answer.

It is C

Explanation:

A geodynamo is the movement of the liquid outer core, which cases the powerful magnetic field of the Earth.

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.