Match the Term with the Appropriate Phrase

Match the term with the appropriate phrase. You may use each answer once, more than once or not at all.
-precision-depth recorder (PDR)

A) used to map ocean floor from space
B) cumulative plot of area versus depth or elevation
C) measurement of ocean depth and seafloor topography
D) a method of mapping the topography of the ocean floor along a strip up to 60 km
E) used echo soundings in 1952 to identify mid-ocean ridge in South Atlantic
F) used to determine ocean structure beneath the sea floor
G) uses high frequency sound waves to measure ocean depth

Correct Answer:

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