31. (A) The strength of ocean currents.
(B) The movement of sediment deep in the
ocean.
(C) The best methods for studying deep
ocean processes.
(D) A new way of measuring the depth of the
ocean.
32. (A) Why the book talks about turbidity
currents.
(B) How winds can affect some ocean
currents.
(C) The causes of underwater earthquakes.
(D) What a turbidity current is.
33. (A) It’s cleaner.
(B) it’s heavier.
(C) It’s warmer.
(D) It moves more slowly.
34. (A) By greatly increasing the ocean’s depth in
some areas.
(B) By creating large waves on the surface
of the ocean.
(C) By causing mud or sand to mix with
ocean water
(D) By crushing large amounts of stone.
35. (A) To explain how winds cause turbidity
currents.
(B) To remind the student where ocean
sediments originate.
(C) To explain the effects of turbidity
currents.
(D) To remind the student about the next
assignment.
36. (A) To convince him to go on a canoe trip.
(B) To invite him to a cookout.
(C) To ask if she can borrow his car.
(D) To tell him about a trip she took.
37. (A) A lunch.
(B) A sleeping bag.
(C) A canoe.
(D) A lent.
38. (A) Swimming.
(B) Driving.
(C) Sleeping outdoors.
(D) Canoeing.
39. (A) To find out whether he wants to go
canoeing.
(B) To tell him whether her car is repaired.
(C) To find out what kind of food he is
bringing.
(D) To tell him what time they are leaving.