The most useful way to measure seafloor depth is to ____.
A)measure the time it takes for sound waves to travel from a ship to the seafloor and back
B)use an energy source to produce strong waves that will reflect from the seafloor and layers beneath the seafloor
C)use a very long line with a weight attached
D)make trips to the seafloor in modern submersibles
E)extrapolate depth from temperature and pressure changes
Question 2
Regional metamorphism is confined to convergent plate margins.
Indicate whether the statement is true or false
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