Multiple Choice
Recent evidence suggests that Mars once had a global magnetic field. Assuming this is true, which of the following could explain why Mars today lacks a global magnetic field like that of Earth?
A) Mars's interior has cooled so much its molten core layer no longer undergoes convection.
B) Mars rotates much slower than the Earth.
C) The Martian core is made of rock, while Earth's core is made of metal.
D) Mars is too far from the Sun to have a global magnetic field.
Correct Answer:
Verified
Correct Answer:
Verified
Q7: If the polar ice decreases, what would
Q9: Which two factors are critical to the
Q10: Which of the following has virtually no
Q11: Why does the burning of fossil fuels
Q11: If the Earth were to warm up
Q12: Describe the three sources of internal heat
Q102: Which of the following planets has the
Q103: What type of stresses broke Earth's lithosphere
Q117: Which two geological processes appear to have
Q170: Briefly explain why Mercury, Venus, and the