The rigid crust and uppermost mantle are known collectively as ...

[Wadzanai]

The rigid crust and uppermost mantle are known collectively as the
 
  A) asthenosphere.
  B) lithosphere.
  C) Moho.
  D) Gutenberg discontinuity.

Question 2

Why is a greenhouse an imperfect analogy for how the Earth's atmosphere behaves?
 
  A) A greenhouse allows longwave radiation to escape and mix with the surrounding air, unlike the Earth's atmosphere.
  B) The glass of a greenhouse is designed to allow transmission of both longwave and shortwave radiation, whereas certain atmospheric constituents only allow transmission of shortwave radiation.
  C) It is exceedingly rare for a greenhouse to contain carbon dioxide like the Earth's atmosphere contains.
  D) Passage of longwave radiation to space is delayed by certain atmospheric constituents, but not trapped like an actual greenhouse.

[6ana001]

Answer to Question 1

B

Answer to Question 2

D