OCE Unit 2 Chapter 4 Questions with Correct Answers (Grade A+)
Question 1: Marine sediments that originate in the warm tropical surface ocean would create deposits
in the deep sea composed primarily of: silica metal sulfides calcium carbonate quartz sand volcanic as
Answer: Calcium Carbonate
Question 2: Which one doesn't belong:
A. siliceous ooze
B. quartz sand
C. rock fragments
D. clay
E. volcanic ash
Answer: A. Siliceous ooze
Question 3: Sediment samples from deep beneath the ocean floor are recovered by: rotary drilling grab
sampling instrumented probes gravity coring dredging
Answer: Rotary drilling
Question 4: Of the following environments, where would you expect to find large amounts of
lithogenous sediment? MA -on the continental shelf -in deep trenches not far offshore -on the
continental slope -along the mid-ocean ridge -on coral reefs that exist just below the water surface
Answer: -on the continental shelf -in deep trenches not far offshore
Question 5: Why is this drilling process called rotary drilling? Because a high-powered rotary engine
drives the drilling process. Because the ship spins around in a circle to power the drilling process.
Because the constant pounding on the drill string causes a rotary motion. Because the drill bit turns
around in a circle.
Answer: Because the drill bit turns around in a circle
Question 6: What common household item is used in this video to demonstrate rotary drilling
Answer: -an apple corer
Question 7: In the demonstration, what does the apple represent? a circular fish that isn't very
streamlined the flying object on the end of a string a grain of sand on a beach the deep sea floor a
weight suspended in water
Answer: a deep sea floor
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, Question 8: What have oceanographers determined from analyzing seafloor cores? climate change and
past extinctions how deep the ocean really is Highly-specialized marine life can exist at all depths in the
ocean. There is an abundance of human-produced trash on the deep ocean floor. how fast sediment is
accumulating in the deep ocean
Answer: Climate change and past extinctions
Question 9: abyssal clay: lithogenous (terrigenous) sediment biogenous sediment cosmogenous
sediment hydrogenous sediment
Answer: lithogenous (terrigenous) sediment
Question 10: ice rafting: associated with submarine canyons and deep-sea alluvial fans associated with
glacial deposits depth at which all calcium carbonate is in solution (i.e. dissolved) particle size
classification depth at which calcium carbonate begins to dissolve
Answer: associated with glacial deposits
Question 11: wentworth scale: particle size classification depth at which calcium carbonate begins to
dissolve depth at which all calcium carbonate is in solution (i.e. dissolved) associated with glacial
deposits associated with submarine canyons and deep-sea alluvial fans
Answer: Particle size classification
Question 12: T/F: Texture refers to the size and shape of sediment particles
Answer: True
Question 13: T/F: Sediments derived from weathered rock and volcanic activities are called biogenous
sediments
Answer: False
Question 14: Sediments that are poorly sorted were most likely deposited by: a river delta. a glacier.
organisms the wind. a volcanic eruption.
Answer: a glacier
Question 15: All of the following are examples of lithogenous sediment except: diatom ooze. clays.
glacial deposits. volcanic particles. beach sand.
Answer: diatom ooze
Page 2
Question 1: Marine sediments that originate in the warm tropical surface ocean would create deposits
in the deep sea composed primarily of: silica metal sulfides calcium carbonate quartz sand volcanic as
Answer: Calcium Carbonate
Question 2: Which one doesn't belong:
A. siliceous ooze
B. quartz sand
C. rock fragments
D. clay
E. volcanic ash
Answer: A. Siliceous ooze
Question 3: Sediment samples from deep beneath the ocean floor are recovered by: rotary drilling grab
sampling instrumented probes gravity coring dredging
Answer: Rotary drilling
Question 4: Of the following environments, where would you expect to find large amounts of
lithogenous sediment? MA -on the continental shelf -in deep trenches not far offshore -on the
continental slope -along the mid-ocean ridge -on coral reefs that exist just below the water surface
Answer: -on the continental shelf -in deep trenches not far offshore
Question 5: Why is this drilling process called rotary drilling? Because a high-powered rotary engine
drives the drilling process. Because the ship spins around in a circle to power the drilling process.
Because the constant pounding on the drill string causes a rotary motion. Because the drill bit turns
around in a circle.
Answer: Because the drill bit turns around in a circle
Question 6: What common household item is used in this video to demonstrate rotary drilling
Answer: -an apple corer
Question 7: In the demonstration, what does the apple represent? a circular fish that isn't very
streamlined the flying object on the end of a string a grain of sand on a beach the deep sea floor a
weight suspended in water
Answer: a deep sea floor
Page 1
, Question 8: What have oceanographers determined from analyzing seafloor cores? climate change and
past extinctions how deep the ocean really is Highly-specialized marine life can exist at all depths in the
ocean. There is an abundance of human-produced trash on the deep ocean floor. how fast sediment is
accumulating in the deep ocean
Answer: Climate change and past extinctions
Question 9: abyssal clay: lithogenous (terrigenous) sediment biogenous sediment cosmogenous
sediment hydrogenous sediment
Answer: lithogenous (terrigenous) sediment
Question 10: ice rafting: associated with submarine canyons and deep-sea alluvial fans associated with
glacial deposits depth at which all calcium carbonate is in solution (i.e. dissolved) particle size
classification depth at which calcium carbonate begins to dissolve
Answer: associated with glacial deposits
Question 11: wentworth scale: particle size classification depth at which calcium carbonate begins to
dissolve depth at which all calcium carbonate is in solution (i.e. dissolved) associated with glacial
deposits associated with submarine canyons and deep-sea alluvial fans
Answer: Particle size classification
Question 12: T/F: Texture refers to the size and shape of sediment particles
Answer: True
Question 13: T/F: Sediments derived from weathered rock and volcanic activities are called biogenous
sediments
Answer: False
Question 14: Sediments that are poorly sorted were most likely deposited by: a river delta. a glacier.
organisms the wind. a volcanic eruption.
Answer: a glacier
Question 15: All of the following are examples of lithogenous sediment except: diatom ooze. clays.
glacial deposits. volcanic particles. beach sand.
Answer: diatom ooze
Page 2
