Investigating Oceanography 3rd Edition by Keith A Sverdrup – Test Bank
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Investigating Oceanography 3rd Edition by Keith A Sverdrup –
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Sample Questions
Chapter 3 The Sea Floor and Its Sediments
1) The vertical relief across the mountains of the western United States is similar to the vertical relief across the Mid-Atlantic Ridge.
2) Submarine canyons are features associated principally with the continental slope; some are associated with past or present rivers.
3) Abyssal hills are single, rounded domes extending at least 3 km above the deep-sea floor.
4) Flat-topped seamounts called guyots are formed when volcanic islands subside and are eroded over time.
5) Hydrogenous sediments of the deep-ocean floor predominate in regions where other sediment sources are reduced.
6) Calcareous oozes of the open ocean are associated with mid-ocean ridge and rise systems rather than the deep-ocean basin floor.
7) Siliceous oozes are found at all ocean depths because of the slow dissolving rate of silica.
8) Calcareous deposits are most likely to be found in more acidic seawater undersaturated in calcite.
9) Calcareous sediments of the North Atlantic occur at deeper depths than calcareous sediments in the North Pacific.
10) Red mud or brown clay deposits are found under oceanic regions of high biological productivity.
11) Particles of a well-sorted sediment sample fall within a limited size range.
12) Large particles sink faster than small particles of the same density.
13) Geologic dredges are used to quantitatively sample the seafloor.
14) Large boulders and cobbles scattered over the deep-sea floor at high-temperate latitudes were most likely deposited by turbidity currents.
15) The distinctive layering found in marine sediments indicates that the properties of the sediment and the rates of sedimentation have varied with time.
16) Manganese nodules are composed entirely of manganese.
17) Oil and gas represent only 50% of the mineral value presently taken from the seafloor.
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