Stars much less luminous than the Sun have
A) wider habitable zones, increasing the odds of finding habitable planets and much longer lifetimes allowing life to appear and evolve
B) wider habitable zones, increasing the odds of finding habitable planets but lifetimes too short for life to appear
C) narrower habitable zones, decreasing the odds of finding habitable planets and lifetimes too short for life to appear
D) narrower habitable zones, decreasing the odds of finding habitable planets but much longer lifetimes allowing life to appear and evolve
Correct Answer:
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Q19: If the Earth were to be moved
Q20: Most of the carbon dioxide on Venus
A)
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Q26: The case of Mars tells us that
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