Recent Evidence Suggests That Mars Once Had a Global Magnetic

question 1

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.

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Definitions:

Irrigation Water

Water that is specifically delivered to crops to support their growth in times and areas where rainfall is insufficient.

Conservation Tillage

An agricultural practice that reduces the amount of tilling or plowing, maintaining more crop residue on the soil surface to decrease erosion and water loss.

Conservation Tillage

An agricultural practice that minimizes soil disturbance and reduces soil erosion, preserving soil structure and moisture.

Conventional Tillage

A traditional method of farming that involves plowing, harrowing, and preparing the soil before sowing seeds.