NS2-M3C4 - Undersea Landscapes Quiz 43

Continental shelves may provide food, fuel, and minerals, and may extend just under a mile (off the California coast), or upwards of 800 miles (off the Arctic coast of Russia). What have most maritime nations agreed to regarding the continental shelf being a part of the land?

• It is part of the land out to a depth of 200 meters

• It is not a part of the land.

• The entire shelf is part of the land.

• It is part of the land if it contains fuel.

The deep ocean floor (the true bottom of the ocean) begins at the bottom of the _______ and extends seaward.

• continental rise

• continental slope

• continental shelf

• continental plateau

• continental floor

Which of the following describe basaltic rock? (Input all that apply, then push the ENTER button.)

• smooth appearance

• oceanic crust

• lava cooled rapidly above the Earth’s surface

• speckled whitish color

Where would you most likely find a guyot?

• Antarctica

• Pacific Ocean

• Atlantic Ocean

• Arctic Ocean

Studying sediment core samples can provide a history of the oceanic area. In the North Atlantic Ocean, the sediment accumulates slowly- about ______ of sediment in ______.

• 1 cm; 100 years

• 1 cm; 1000 years

• 1 m; 1000 years

• 1 m; 100 years

A very large mountain range running along the center of the ocean floor

• Coral Reef

• Ocean Peaks

• Ocean Ridge

• Glaciation

A former coral island which has been eroded and subsided below the surface of the ocean.

• Atoll

• Submerged waterfall

• Seamount

• Ocean eruption

Rapidly moving underwater currents carrying debris and sediments

• Rapid tides

• True current

• Countercurrent

• Turbidity current

A device for measuring depth of water by sending sound waves down from the surface and recording the time until the echo returns from the bottom

• Fathom meter

• Echo sounder

• Depth meter

The steep descent of the seabed from the Continental Shelf to the abyssal zone

• Continental Shelf

• Continental Rift

• Continental Slope