The magnetic fields of Uranus and Neptune appear to originate in the
A) rocky cores of the planets.
B) liquid water-ammonia mixture in the mantles of the planets.
C) layer of liquid hydrogen and helium in the outer parts of the planets.
D) methane in the atmospheres of the planets.

Question

Quizplus · Accepted Answer

The magnetic fields of Uranus and Neptune are thought to originate in the planets' mantles, where a conductive liquid mixture of water and ammonia circulates and generates a magnetic field through dynamo action.

The Magnetic Fields of Uranus and Neptune Appear to Originate