Exam 9: Oceans: The Last Frontier

The west coast of South America and the east coast of North America display the same kind of continental margin.

Where does an accretionary wedge form?

________ is the total amount of solid material dissolved in water.

Sand, silt, and clays deposited on the ocean floor are described as terrigenous sediments.

What kind of seawater is densest?

A prominent feature of the Mid-Atlantic Ridge is a very deep linear valley known as a(n)________.

Ocean covers approximately ________ percent of Earth's surface

Seamounts ________.

________ is the proportion of dissolved salts to pure water.

The salts in seawater come both from the weathering of the continents and ________ by submarine volcanoes.

The crests of mid-oceanic ridges ________.

Minerals that crystallize directly from seawater are examples of ________ sediment.

________ develop where oceanic lithosphere bends downward and sinks into the mantle.

Manganese nodules do not accumulate in shallow water.

The ocean has a three-part layered structure (surface mixed zone, transitional zone, and deep zone)at all latitudes.

How many seconds would it take an echo sounder's ping to make the trip from a ship to the Challenger Deep (10,994 meters)and back? Recall that depth = 1/2 (1500 m/sec × Echo travel time).

How does the average depth of the oceans compare to the average elevation of the continents?

Valleys that lead from the continental shelf into deeper waters are known as ________. Typically, we find ________ along the continental rise at the bottom of these valleys.

A deep-sea fan at the base of a continental slope is more likely to be covered with thick turbidite layers than a mid-ocean ridge.

Which element is most common dissolved in seawater?