What are the basic requirements for a terrestrial world to have a global magnetic field?

Question

Quizplus · Accepted Answer

A terrestrial world must have a core layer of molten, convecting material and sufficiently rapid rotation to have a global magnetic field. The convecting material in the core generates the magnetic field, while the rapid rotation helps to amplify and maintain it. Metal cores and rocky mantles may be present, but they are not the primary requirements for a global magnetic field.

What Are the Basic Requirements for a Terrestrial World to Have