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Oceanography Ch. 3 Test 1
measurement of ocean depth and seafloor topography
side-scan sonar system
cumulative plot of area versus depth or elevation
uses high-frequency sound waves to measure ocean depth
used to determine shape and position of boundaries
Abyssal plains are more extensive on the floor of the Atlantic than on the floor of the Pacific
Sediments of the continental rise can exhibit depositional characteristics similar to those formed by rivers on land.
A sediment-laden current that flows off of the continental shelf is called a turbidity current.
The deepest portions of the ocean are part of relatively narrow features called submarine canyons.
Seamounts form from ancient tablemounts.
Mid-ocean ridges are features that occupy a small portion of the deep ocean basin, only around 10%.
Hydrothermal vents have a significant impact on ocean chemistry.
Because of the very harsh environment, few organisms are found in association with hydrothermal vents.
some interior continental areas/ coastal plains and abyssal plains.
The two relatively flat areas on the hypsographic curve represent:
The method that is most frequently used to investigate sediment and rock layers of the sea floor is:
All the above statements are correct.
Satellites are used to map the ocean floor because they:
Passive continental margins are characterized by all the following except:
broad continental shelf.
Characteristics of active continental margins include all the following except:
shelf, slope, rise, abyssal plain
The correct order of marine provinces from the coast to the mid-ocean ridge is:
Directly seaward of the continental shelf is a more steeply sloping region called the:
All the following are considered part of the continental margin except the:
by many deep sea fans.
Continental rises are formed:
c. and/or d.
Submarine canyons were most likely formed by
The steepest slope in the ocean is found at the:
The most gradual slope in the ocean can be found at the:
Old lithosphere is destroyed in association with:
sediment has covered those found in the other ocean basins.
Abyssal hills are most common in the Pacific Ocean because:
New lithosphere is produced in association with:
Hydrothermal vents between 30°C and 350°C produce:
in the same direction as the plates are spreading.
The direction of motion along a seafloor transform fault is:
perpendicular to the ridge axes.
With respect to mid-ocean ridges, transform faults are:
global positioning satellite (GPS), continental flood basalt, deep focus earthquake, ridge crest
Examine the five words and/or phrases and determine the relationship among the majority of words/phrases. Choose the one option that does not fit the pattern.
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