19. We confidently rule out the possibility of life on Mercury because A) it is
ID: 1498575 • Letter: 1
Question
19. We confidently rule out the possibility of life on Mercury because
A) it is too far from the Sun to be considered within its habitable zone
B) it lacks an atmosphere, so liquid water is not stable on its surface
C) it has cooled off so much, all the water is frozen in the permafrost layer
D) its enormous greenhouse effect makes it too hot on the surface
E) impacts from asteroids would kill any life that tried to evolve
20. We confidently rule out the possibility of life on the Moon because
A) it is too far from the Sun to be considered within its habitable zone
B) it lacks an atmosphere, so liquid water is not stable on its surface
C) it has cooled off so much, all the water is frozen in the permafrost layer
D) its enormous greenhouse effect makes it too hot on the surface
E) impacts from asteroids would kill any life that tried to evolve
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Explanation / Answer
19)
D) its enormous greenhouse effect makes it too hot on the surface
20)
it has cooled off so much, all the water is frozen in the permafrost layer