Dust devils: A) form from the bottom up. B) do not occur over ...

[tsand2]

Dust devils:
 
  A) form from the bottom up.
  B) do not occur over vegetated surfaces.
  C) are most common in the tropics.
  D) can last for days.
  E) are associated with convective clouds.

Question 2

Describe and give an example of a passive continental margin.
 
  What will be an ideal response?

[peilian]

Answer to Question 1

A

Answer to Question 2

A passive margin is not a plate boundary but a part of the same plate as the adjoining oceanic crust. In the quiet environment, deposition of sediment on the continental shelf is producing a thick wedge of shallow-water sandstones, limestones, and shales that pile up because there is no destruction by a subduction zone. The East Coast of North America is an example of a passive continental margin.