OCE 1001 Exam 1 Questions with Correct Answers (Grade A+)
Question 1: The density of Earth materials ______ as the core is approached
Answer: increases
Question 2: What observation supports the theory of sea floor spreading?
Answer: Seafloor magnetic anomalies
Question 3: The crust and the mantle are divided into the following layers in order of increasing depth:
Answer: lithosphere, asthenosphere, mesosphere
Question 4: In relation to plate tectonics, what is a major overall trend in earthquakes?
Answer: Earthquakes occur at plate boundaries
Question 5: How is a hotspot formed?
Answer: There are mantle plumes that work like chimneys, through which gases and magma rise from deep
within the earth
Question 6: Hotspots create what?
Answer: Volcanic islands
Question 7: How is a volcanic island chain made?
Answer: New islands are made over hotspots. These islands are then carried away by plate motion, then
forming a chain.
Question 8: When a coral reef reaches the Atoll stage, what has happened to the island?
Answer: The island is in the middle, but is completely submerged underwater
Question 9: If lithosphere plates did not move, which is the only stage of coral reefs that would exist?
Answer: Fringing reef
Question 10: What is a fathom?
Answer: It was derived from the length of an average person's outstretched arms.
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, Question 11: How can a satellite measure ocean depth?
Answer: They can use microwave beams that bounce back from the ocean surface, which is shaped by the
sea floor
Question 12: What kind of continental margin has an oceanic trench?
Answer: Active margin
Question 13: Seismic Profiling
Answer: A method used to determine what the layers beneath the ocean floor look like
Question 14: What is characteristic of a passive continental margin?
Answer: Broad continental shelf with a gentle continental slope
Question 15: Continental margin
Answer: One of the major marine provinces
Question 16: Turbidity current
Answer: Underwater avalanches mixed with rocks and other debris
Question 17: What is NOT a hydrogenous sediment?
Answer: Tektites
Question 18: What generates silica oozes?
Answer: Diatoms, Radiolarians
Question 19: Sediments found on the seafloor and attributed to processes in the past
Answer: Relict sediments
Question 20: How does the particle size of terrigenous sediments generally change with distance from
shore?
Answer: Decreases
Question 21: Lithogenous sediment is:
Answer: Derived from rock
Page 2
Question 1: The density of Earth materials ______ as the core is approached
Answer: increases
Question 2: What observation supports the theory of sea floor spreading?
Answer: Seafloor magnetic anomalies
Question 3: The crust and the mantle are divided into the following layers in order of increasing depth:
Answer: lithosphere, asthenosphere, mesosphere
Question 4: In relation to plate tectonics, what is a major overall trend in earthquakes?
Answer: Earthquakes occur at plate boundaries
Question 5: How is a hotspot formed?
Answer: There are mantle plumes that work like chimneys, through which gases and magma rise from deep
within the earth
Question 6: Hotspots create what?
Answer: Volcanic islands
Question 7: How is a volcanic island chain made?
Answer: New islands are made over hotspots. These islands are then carried away by plate motion, then
forming a chain.
Question 8: When a coral reef reaches the Atoll stage, what has happened to the island?
Answer: The island is in the middle, but is completely submerged underwater
Question 9: If lithosphere plates did not move, which is the only stage of coral reefs that would exist?
Answer: Fringing reef
Question 10: What is a fathom?
Answer: It was derived from the length of an average person's outstretched arms.
Page 1
, Question 11: How can a satellite measure ocean depth?
Answer: They can use microwave beams that bounce back from the ocean surface, which is shaped by the
sea floor
Question 12: What kind of continental margin has an oceanic trench?
Answer: Active margin
Question 13: Seismic Profiling
Answer: A method used to determine what the layers beneath the ocean floor look like
Question 14: What is characteristic of a passive continental margin?
Answer: Broad continental shelf with a gentle continental slope
Question 15: Continental margin
Answer: One of the major marine provinces
Question 16: Turbidity current
Answer: Underwater avalanches mixed with rocks and other debris
Question 17: What is NOT a hydrogenous sediment?
Answer: Tektites
Question 18: What generates silica oozes?
Answer: Diatoms, Radiolarians
Question 19: Sediments found on the seafloor and attributed to processes in the past
Answer: Relict sediments
Question 20: How does the particle size of terrigenous sediments generally change with distance from
shore?
Answer: Decreases
Question 21: Lithogenous sediment is:
Answer: Derived from rock
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