Question 1

_______ form the deepest parts of the ocean basins.

Accepted Answer

A)  Trenches 
B)  Submarine canyons 
C)  Continental shelves 
D)  Continental slopes 
A)  Trenches 
B)  Submarine canyons 
C)  Continental shelves 
D)  Continental slopes A

Question 2

The continental rise lies_______  the continental slope.

Accepted Answer

A)  within 
B)  just above 
C)  nowhere near 
D)  just below 
A)  within 
B)  just above 
C)  nowhere near 
D)  just below D

Question 3

Consider the diagram below.   What type of margin is this?

Accepted Answer

A)  Passive, because the deep sea fans indicate tectonic activity. 
B)  Passive, because the lack of trenches and subducting oceanic crust indicate tectonic activity. 
C)  Active, because the deep sea fans indicate tectonic activity. 
D)  Active, because the lack of trenches and subducting oceanic crust indicate tectonic activity. 
A)  Passive, because the deep sea fans indicate tectonic activity. 
B)  Passive, because the lack of trenches and subducting oceanic crust indicate tectonic activity. 
C)  Active, because the deep sea fans indicate tectonic activity. 
D)  Active, because the lack of trenches and subducting oceanic crust indicate tectonic activity. B

Question 4

What is the difference between an active continental margin and a passive continental margin?

Accepted Answer

A)  An active margin receives large amounts of sediment whereas a passive margin is sediment starved. 
B)  A passive margin is the site of an ancient continental rift, left behind when seafloor spreading moved offshore, whereas an active margin is an active plate boundary. 
C)  An active margin has earthquakes whereas a passive margin has quiet erupting aka passive. volcanoes. 
D)  A passive margin is passively carried along by plate tectonics in a transform system, like the San Andreas whereas an active margin is a trench. 
A)  An active margin receives large amounts of sediment whereas a passive margin is sediment starved. 
B)  A passive margin is the site of an ancient continental rift, left behind when seafloor spreading moved offshore, whereas an active margin is an active plate boundary. 
C)  An active margin has earthquakes whereas a passive margin has quiet erupting aka passive. volcanoes. 
D)  A passive margin is passively carried along by plate tectonics in a transform system, like the San Andreas whereas an active margin is a trench.

Question 5

The 2010 Deepwater Horizon oil spill in the Gulf of Mexico was the largest environmental disaster in North American history. It was brought on in part by new technology allowing development of oil and gas reserves in deep water. Given the scope of the spill, why do companies take a risk of such a disaster given the scope of the litigation following the disaster?

Accepted Answer

A)  The oil and gas industry is poor at assessing risk, and didn't understand the risk. 
B)  They just assume their lawyers can win any lawsuit, regardless of the disaster. 
C)  The potential profit is so large from a major oil find that the companies take the risk, try to use all cautions to minimize risk, but sometimes fail. 
D)  They didn't care about the risk, they just drove forward. 
A)  The oil and gas industry is poor at assessing risk, and didn't understand the risk. 
B)  They just assume their lawyers can win any lawsuit, regardless of the disaster. 
C)  The potential profit is so large from a major oil find that the companies take the risk, try to use all cautions to minimize risk, but sometimes fail. 
D)  They didn't care about the risk, they just drove forward.

Question 6

Which one of the following would most likely be covered with thick turbidite layers?

Accepted Answer

A)  upper part of a steep, narrow, submarine canyon 
B)  ocean floor around a conical- shaped seamount 
C)  deep- sea fan at the base of a continental slope 
D)  axial rift zone of an active mid- ocean spreading center 
A)  upper part of a steep, narrow, submarine canyon 
B)  ocean floor around a conical- shaped seamount 
C)  deep- sea fan at the base of a continental slope 
D)  axial rift zone of an active mid- ocean spreading center

Question 7

Sediments derived primarily from the products of weathering on the continents are called

Accepted Answer

A)  terrigenous sediment 
B)  biogenous sediment 
C)  hydrogenous sediment 
D)  both terrigenous and biogenous sediment 
A)  terrigenous sediment 
B)  biogenous sediment 
C)  hydrogenous sediment 
D)  both terrigenous and biogenous sediment

Question 8

There are mid- ocean ridges in _______ .

Accepted Answer

A)  the Indian Ocean 
B)  the Atlantic Ocean 
C)  the Pacific Ocean 
D)  all three of these oceans 
A)  the Indian Ocean 
B)  the Atlantic Ocean 
C)  the Pacific Ocean 
D)  all three of these oceans

Question 9

Most of our table salt comes from______ .

Accepted Answer

A)  combining the metal sodium and the nonmetal chlorine gas in a chemical reaction vessel to make pure NaCl 
B)  China 
C)  salt obtained by evaporating seawater in dry climates 
D)  salt taken from mines 
A)  combining the metal sodium and the nonmetal chlorine gas in a chemical reaction vessel to make pure NaCl 
B)  China 
C)  salt obtained by evaporating seawater in dry climates 
D)  salt taken from mines

Question 10

An echo sounder operates by measuring the time required for a______ .

Accepted Answer

A)  sound pulse travels from a ship to the seafloor and back 
B)  radar beam to travel from a ship to the seafloor and back 
C)  light beam to travel from a satellite at a known altitude to the sea bottom and back 
D)  radar beam to travel from a harbor patrol boat to a fuzz- buster on a speeding yacht 
A)  sound pulse travels from a ship to the seafloor and back 
B)  radar beam to travel from a ship to the seafloor and back 
C)  light beam to travel from a satellite at a known altitude to the sea bottom and back 
D)  radar beam to travel from a harbor patrol boat to a fuzz- buster on a speeding yacht

Question 11

Give the correct type of ocean floor sediment for each phrase.
-Abyssal plain clay

Accepted Answer

A)  biogenous 
B)  hydrogenous 
C)  terrigenous 
D)  phytogenuous 
A)  biogenous 
B)  hydrogenous 
C)  terrigenous 
D)  phytogenuous

Question 12

Examine the words and/or phrases below and determine the relationship among the majority of words/phrases. Choose the option that does not fit the pattern.

Accepted Answer

A)  continental slope 
B)  continental volcanic arc 
C)  continental shelf 
D)  continental rise 
A)  continental slope 
B)  continental volcanic arc 
C)  continental shelf 
D)  continental rise

Question 13

Where are the deepest parts of the oceans?

Accepted Answer

A)  along the base of the continental slope 
B)  in the abyssal plain 
C)  in rift valleys at sea floor spreading center 
D)  in trenches 
A)  along the base of the continental slope 
B)  in the abyssal plain 
C)  in rift valleys at sea floor spreading center 
D)  in trenches

Question 14

Minerals that crystallize directly from seawater are examples of______ .

Accepted Answer

A)  terrigenous sediment 
B)  biogenous sediment 
C)  hydrogenous sediment 
D)  both terrigenous and biogenous sediment 
A)  terrigenous sediment 
B)  biogenous sediment 
C)  hydrogenous sediment 
D)  both terrigenous and biogenous sediment

Question 15

It is thought that submarine canyons on the continental slope have been generated by______ .

Accepted Answer

A)  streams when sea level was much lower than it is today 
B)  streams when sea level was much higher than it is today 
C)  turbidity currents 
D)  a submarine glaciations 
A)  streams when sea level was much lower than it is today 
B)  streams when sea level was much higher than it is today 
C)  turbidity currents 
D)  a submarine glaciations

Question 16

Which one of the following statements about mid- ocean ridges is false?

Accepted Answer

A)  They are sites for submarine eruptions of basaltic lava. 
B)  Sediments include thick siliceous ooze deposits and sandy turbidite beds. 
C)  They are where young lithosphere is added to the edges of spreading, oceanic plates. 
D)  Terrigenous sediment coverings are very thin or absent. 
A)  They are sites for submarine eruptions of basaltic lava. 
B)  Sediments include thick siliceous ooze deposits and sandy turbidite beds. 
C)  They are where young lithosphere is added to the edges of spreading, oceanic plates. 
D)  Terrigenous sediment coverings are very thin or absent.

Question 17

How do atolls form?

Accepted Answer

A)  from turbidity currents 
B)  from fringing coral reefs around a volcano 
C)  sediment traps in trenches 
D)  from black smokers that build up excess minerals 
A)  from turbidity currents 
B)  from fringing coral reefs around a volcano 
C)  sediment traps in trenches 
D)  from black smokers that build up excess minerals

Question 18

_______ continental margins typically exhibit wide, extensive, continental shelves.

Accepted Answer

A)  Turbidity 
B)  Passive 
C)  Active 
D)  Deep sea 
A)  Turbidity 
B)  Passive 
C)  Active 
D)  Deep sea

Question 19

If Yellowstone were on the ocean floor, it would produce ______.

Accepted Answer

A)  a mid- ocean ridge 
B)  an island arc 
C)  a chain of line islands, like Hawaii 
D)  a trench 
A)  a mid- ocean ridge 
B)  an island arc 
C)  a chain of line islands, like Hawaii 
D)  a trench

Question 20

Identify what is pictured here:

Accepted Answer

A)  rift valleys 
B)  hydrogenous flow structures 
C)  black smokers 
D)  guyots 
A)  rift valleys 
B)  hydrogenous flow structures 
C)  black smokers 
D)  guyots

Exam 13: The Ocean Floor

_______ form the deepest parts of the ocean basins.

The continental rise lies_______ the continental slope.

Consider the diagram below. What type of margin is this?

What is the difference between an active continental margin and a passive continental margin?

Which one of the following would most likely be covered with thick turbidite layers?

Sediments derived primarily from the products of weathering on the continents are called

There are mid- ocean ridges in _______ .

Most of our table salt comes from______ .

An echo sounder operates by measuring the time required for a______ .

Give the correct type of ocean floor sediment for each phrase. -Abyssal plain clay

Examine the words and/or phrases below and determine the relationship among the majority of words/phrases. Choose the option that does not fit the pattern.

Where are the deepest parts of the oceans?

Minerals that crystallize directly from seawater are examples of______ .

It is thought that submarine canyons on the continental slope have been generated by______ .

Which one of the following statements about mid- ocean ridges is false?

How do atolls form?

_______ continental margins typically exhibit wide, extensive, continental shelves.

If Yellowstone were on the ocean floor, it would produce ______.

Identify what is pictured here:

Introduction to Earth Science

Matter and Minerals

Rocks: Materials of the Solid Earth

Plate Tectonics: a Scientific Revolution Unfolds

Earthquakes and Earths Interior

Volcanoes and Other Igneous Activity

Crustal Deformation and Mountain Building

Weathering, Soil, and Mass Movement

Running Water and Groundwater

Glaciers, Deserts, and Wind

Geologic Time

Earths Evolution Through Geologic Time

Ocean Water and Ocean Life

The Dynamic Ocean

The Atmosphere: Composition, Structure, and Temperature

Moisture, Clouds, and Precipitation

Air Pressure and Wind

Weather Patterns and Severe Storms

World Climates and Global Climate Change

Origins of Modern Astronomy

Touring Our Solar System

Light, Telescopes, and the Sun

Beyond Our Solar System

Filters