Question

according to the text, what geological feature is primarily formed at divergent plate boundaries?
answer:
a. deep ocean trenches
b. mid - ocean ridges
c. folded mountain ranges
d. volcanic arcs
question:
the san andreas fault in california is an example of which type of plate boundary, and what geological event is commonly associated with it?
answer:
a. convergent boundary; volcanic eruptions
b. convergent boundary; mountain building
c. divergent boundary; seafloor spreading
d. transform boundary; earthquakes

Explanation:

1. At divergent plate boundaries, new crust is formed as plates move apart. Mid - ocean ridges are formed due to the upwelling of magma to fill the gap created by the separating plates. Deep ocean trenches are formed at convergent boundaries (subduction zones), folded mountain ranges are also formed at convergent boundaries through the collision of plates, and volcanic arcs are associated with convergent plate boundaries where one plate subducts beneath another.
2. The San Andreas Fault is a transform boundary where two plates slide past each other horizontally. Earthquakes are commonly associated with transform boundaries because the stress builds up as the plates try to move past each other and then is released suddenly.

Answer:

1. B. Mid - ocean ridges
2. D. Transform boundary; earthquakes