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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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

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