Which statements about earth’s core explain earth’s magnetic field? check all that apply.

earth’s core is composed of magnets.

the inner core is solid.

the outer core is solid.

the inner core is liquid and moving.

the outer core is liquid and moving.

earth’s core is composed of iron and nickel.

The inner core is solid.

The outer core is liquid and moving.

Earth’s core is composed of iron and nickel.

Explanation:

Convection currents are produced in the outer liquid core. This motion together with the Earth's rotation creates a system of electrical currents, since it is composed of metals such as iron and nickel. The magnetic fields generated by the electric currents align, creating the Earth's magnetic field. The solid inner core acts as a stabilizer of the magnetic field generated by the liquid outer core.

the minimum amperage that the current in this wire would have to have so that its weight is completely supported by the magnetic force due to earth's field, assuming that no other forces except gravity act on it