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GLORIA

device used for side-scan sonar

Hypsometric curve

cumulative plot of area versus depth or

PDR

Uses high frequency sound waves to measure ocean depth

Seismic survey

used to determine shape and position of boundaries

Abyssal plains are more extensive on the floor of the Atlantic as compared those on the
floor of the Pacific

True

Sediments of the continental rise can exhibit characteristics similar to those formed by
rivers on land.

True

A sediment-laden current that flows off of the continental shelf is called a turbidity
current

True

The deepest portions of the ocean are part of the relatively narrow features called
submarine canyons

False

Seamounts form from ancient tablemounts

False

Mid-ocean ridges are rises occupy a small portion of the deep ocean basin, only around
10%.

False

Hydrothermal vents have a significant impact on ocean chemistry

True

Due to the very harsh environment, few organisms are found in association with
hydrothermal vents

False

The two relatively flat areas on the hypsometric curve represent

some interior continental areas/ coastal plains and abyssal plains

The method that is most frequently used to investigate sediment and rock layers of the sea floor is:

Sound waves

Satellites are used to map the ocean floor because they

a. are unaffected by surface weather.
b. can cover areas where ships have not produced surveys.
c. can "see" large areas of the seafloor at one time.
d. the shape of the ocean surface itself reflects large features on the seafloor below

Passive continental margins are characterized by all of the following

a. broad continental shelf.
c. shallow coastal waters.
d. thick sediment accumulation.
e. very little volcanic and earthquake activity.

Characteristics of active continental margins include all of the following

b. chains of islands.
c. deep-sea trenches.
d. thin sediment accumulation.
e. volcanic and earthquake activity.

The correct order of marine provinces from the coast to the mid-ocean ridge is

shelf, slope, rise, abyssal plain.

Directly seaward of the continental shelf is a more steeply sloping region called the:

Continental Slope

All of the following are considered part of the continental margin

a. continental rise.
b. continental shelf.
c. continental slope.
e. submarine canyon.

Continental rises are formed:

by many deep sea fans

Submarine canyons were most likely formed by

erosion by turbidity currents

The most rapid change in slope in the ocean is found at the

oceanic trench

The most gradual change in slope in the ocean can be found at the

abyssal plain.

Old lithosphere is destroyed in association with

deep-sea trenches

Abyssal hills are only visible in the Pacific Ocean because

they are higher in the Pacific than in the other ocean basins

New lithosphere is produced in association with

mid-ocean ridges

Hydrothermal vents between 30 degrees C and 350 degrees C produce

white smokers

With respect to mid-ocean ridges, transform faults are

perpendicular to the ridge axis

coccolithophores

biogenous sediment

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