Mars' magnetic field is so weak because:
A) it spins much slower than Earth does.
B) it core may no longer be molten.
C) its core contains less iron than our own.
D) Both B and C are probable.
E) All of the above are correct.

Question

Quizplus · Accepted Answer

Mars' magnetic field is weak because it is believed that its core may no longer be molten and may contain less iron than Earth's core. Both factors contribute to the reduction in the strength of its magnetosphere. Mars also spins slower than Earth, but this is not the primary reason for the weakness of its magnetic field.

Mars' Magnetic Field Is So Weak Because