The Ocean floor and its sediments

What is the typical rate of abyssal clay accumulation on the deep sea floor? 1 m/year 1 mm/1000 years 10 m/year 10 mm/1000 years 100 mm/1000 years

1mm/1000 years

How far below sea level is the Calcite Compensation Depth (CCD) on average? 1000 m 2000 m 3000 m 4500 m 6500 m

4500m

What portion of the earth is currently covered by oceanic crust? 42% 53% 64% 71% 83%

64%

What portion of the earth is currently covered by ocean water? 42% 53% 64% 71% 83%

71%

What is the age order of sea floor types (the crust underlying them) from oldest to youngest? Abyssal hills, abyssal plains, mid-ocean ridge, continental shelf. Abyssal plains, abyssal hills, mid-ocean ridge, continental shelf. Continental shelf, abyssal plains, abyssal hills, mid-ocean ridge. Mid-ocean ridge, abyssal hills, abyssal plains, continental shelf. Mid-ocean ridge, abyssal plains, abyssal hills, continental shelf.

Continental shelf, abyssal plains, abyssal hills, mid-ocean ridge

Which ocean province is the deepest? Abyssal hills Abyssal plains Continental rise Continental shelf Continental slope

abyssal

In which ocean province are fracture zones most apparent? Abyssal hills Abyssal plains Continental rise Continental shelf Continental slope

abyssal hills

Which ocean province generally has the thinnest sediments? Abyssal hills Abyssal plains Continental rise Continental shelf Continental slope

abyssal hills

Which ocean basin is the smallest? Arctic Atlantic Indian Pacific

arctic

Where are the major ocean basins most connected to one another such that substantial water is exchanged between them? Around Antarctica At the North Pole Near the equator Throughout the northern hemisphere Throughout the southern hemisphere

around antarctica

Where does most sediment deposition take place? Around continental margins Around oceanic islands In deep-sea trenches In the middle of ocean basins On land

around continental margins

Which ocean is increasing most in size over time? Arctic Atlantic Indian Pacific

atlantic

Which kind of sediment is likely to dissolve in deep ocean water? Abyssal clay Banded iron Calcareous ooze Sandstone Siliceous ooze

calcareous ooze

What is the most common mineral for marine organisms to build skeletons from? Apatite (Ca5(PO4)3(OH)) Calcite (CaCO3) Gypsum (CaSO4) Halite (NaCl) Quartz (SiO2)

calcite

Which ocean province is the shallowest? Abyssal hills Abyssal plains Continental rise Continental shelf Continental slope

continental shelf

Which ocean province is underlain by continental crust? Abyssal hills Abyssal plains Continental rise Continental shelf Continental slope

continental shelf

Which ocean province is steep and cut by erosional submarine canyons? Abyssal hills Abyssal plains Continental rise Continental shelf Continental slope

continental slope

Where is calcite (such as calcareous ooze) most likely to dissolve? Deep ocean depths Hypersaline lagoons Inland seas Shallow polar waters Shallow tropical waters

deep ocean depths

Which organisms build their skeletons of silica (quartz, SiO2)? Clams and Snails Corals and Bryozoans Diatoms and Radiolarians Forams and Coccoliths Sea urchins and Crinoids

diatoms and radiolarians

Which ocean basin is the largest? Arctic Atlantic Indian Pacific

pacific

Which ocean is decreasing most in size over time? Arctic Atlantic Indian Pacific

pacific

what does a Hypsographic Curve illustrate? Contour lines on the ocean floor Portion of the earth at various elevations The configuration of oceans and continents around the globe The rate of spreading at mid-ocean ridges The rate of subduction at deep-sea trenches

portion of the earth at various elevations

What is the Calcite Compensation Depth (CCD)? The depth at which calcium carbonate and abyssal clays are in equal concentrations The depth at which calcium carbonate and silica are in equal concentrations The depth at which calcium carbonate concentration is the highest The depth at which calcium carbonate dissolves at the same rate it arrives from above The depth below which calcium carbonate is never found

the depth of which calcium carbonate dissoves at the same rate it arrives from

Why are more calcareous oozes found in the South Pacific than in the North Pacific? Foraminifera are more dense in the southern hemisphere. Ocean currents carry most calcite skeletons into the southern hemisphere. The South Pacific has an unusually high calcium ion concentration. The South Pacific has shallower water. The South Pacific is much warmer than the North Pacific.

the south pacific has shallower water