Question 1
Consider the diagram below.

What type of margin is this?
◦ Passive, because the lack of trenches and subducting oceanic crust indicate tectonic activity.
◦ Active, because the lack of trenches and subducting oceanic crust indicate tectonic activity.
◦ Active, because the deep sea fans indicate tectonic activity.
◦ Passive, because the deep sea fans indicate tectonic activity.
Question 2
Which of the following is
not true of deep ocean trenches?
◦ They are geologically very stable.
◦ They are sites where plates plunge back into the mantle.
◦ They may act as sediment traps.
◦ They are long and narrow depressions.