A basic tool for indirectly studying the sea floor is the ____, which measures water depth.
A) drilling ship
B) rock dredge
C) submersible
D) echo sounder
E) gravimeter
Correct Answer:
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Q27: _ currents are bottom currents that flows
Q28: This instrument works on essentially the same
Q29: Water depth increases over a continental shelf
Q30: The crests of mid-oceanic ridges are associated
Q31: A(n) _ continental margin usually lacks a
Q33: Earthquakes, volcanoes, Benioff seismic zones, and island
Q34: A(n) _ is a great mass of
Q35: The _ crust of the sea floor
Q36: Mid-oceanic ridges are often marked by lines
Q37: The _ is a shallow submarine platform
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