The minimum size that makes it possible for a planetary surface to remain habitable over long time periods is a size that allows
A) plate tectonics to be present
B) a magnetic field to be present
C) an atmosphere to be present
D) hot spot volcanism to be present
Correct Answer:
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Q17: Apart from its distance from its parent
Q18: When the Earth first formed it had
Q19: If the Earth were to be moved
Q20: Most of the carbon dioxide on Venus
A)
Q21: If life is present on Venus today,
Q23: A star less luminous than our Sun
Q24: Stars much less luminous than the Sun
Q25: What can contribute to a planet losing
Q26: The case of Mars tells us that
Q27: What role does an atmosphere play in
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