Physical Science: Oceans 2 – Flashcards
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Which of the following would most likely be covered with thick turbidite layers?
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deep-sea fan at the base of a continental slope
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The BEST definition of the outer edge of the continental shelf is that point where _____________.
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a rapid steepening of the gradient occurs
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Which of the following is associated with the ocean ridge?
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Mountainous topography, volcanic structures, & rift zones (all the above).
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Sediments derived primarily from the products of weathering on the continents are called _____________.
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terrigenous sediments
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Manganese nodules are an example of ______________.
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hydrogenous sediment
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The gently submerged surface extending from the shoreline towards the deep ocean is termed the _______.
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continental shelf
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___________ develop where oceanic lithosphere bends downward and sinks into the mantle.
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Deep ocean trenches
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An echo sounder operates by measuring the time required for a ___________.
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sound pulse travels from a ship to the seafloor and back.
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The oceans cover approximately ___________ percent of Earth's surface.
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70%
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Concerning the distribution of land and water, which of the following statements is true?
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The Southern Hemisphere has much more water surface than the Northern Hemisphere
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The ____________ Ocean has more extensive abyssal plains than the Pacific Ocean because it has fewer trenches to trap sediments moving down the continental slope.
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Atlantic
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It is thought that submarine canyons on the continental slope have been generated by ___________.
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turbidty currents
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Seamounts
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are volcanoes that form on the ocean floor
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The most abundant salt in seawater is
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NaCl
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A rapid change in temperature with depth in the ocean is called the ____________.
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thermocline
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Thermoclines in the ocean are best developed at
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low latitudes
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Density in seawater is determined by
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both temperature and salinity
