Briefly describe the two models proposed for mantleplate ...

[altibaby]

Briefly describe the two models proposed for mantleplate convection.
 
  What will be an ideal response?

Question 2

Assume that the actual vapor content of the air remains constant over the course of a day. How does the relative humidity at 2:00 p.m. probably compare to the relative humidity at 5:00 a.m.?
 
  A) The relative humidity at 2:00 p.m. is lower.
  B) The relative humidity is the same at 2:00 p.m. as at 5:00 a.m.
  C) The relative humidity at 2:00 p.m. is higher.

[yasmina]

Answer to Question 1

a. The whole-mantle model, in which cold oceanic lithosphere sinks to nearly the coremantle boundary and stirs the entire mantle
b. The layer cake model, in which the driving forces are the same, but there are two zones of convection: a thin, dynamic layer in the upper mantle and a thick, larger, sluggish one located below

Answer to Question 2

A

[altibaby]

Great answer, keep it coming

[lcapri7]

Excellent