Multiple Choice
What are the basic requirements for a terrestrial world to have a global magnetic field?
A) a core layer of molten,convecting material and sufficiently rapid rotation
B) a metal core and rapid rotation
C) a metal core,a rocky mantle,and sufficiently rapid rotation
D) a core that has a molten layer and a mantle that has convection
Correct Answer:
Verified
Correct Answer:
Verified
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