At least 90% of Earth's magnetic field is generated by the
A)inner core.
B)outer core.
C)lower mantle.
D)asthenosphere.
E)Mohorovičić discontinuity.

Question

Quizplus · Accepted Answer

Earth's magnetic field is generated by the motion of molten iron in the outer core. The inner core is solid iron, and while it does contribute to the magnetic field, it is not the primary source. The lower mantle, asthenosphere, and Mohorovičić discontinuity do not have the necessary properties to generate a magnetic field.

At Least 90% of Earth's Magnetic Field Is Generated by the