Question 1

A prominent feature of the Mid-Atlantic Ridge is a very deep linear valley known as a(n) ________ valley.

Accepted Answer

The answer of A prominent feature of the Mid-Atlantic Ridge...

Question 2

The ________ Ocean is largest.

Accepted Answer

A)  Atlantic 
B)  Pacific 
C)  Indian 
D)  Arctic 
A)  Atlantic 
B)  Pacific 
C)  Indian 
D)  Arctic

Question 3

________ sediment consists of shells and hard parts of marine organisms.

Accepted Answer

The answer of ________ sediment consists of shells and hard...

Question 4

The oceans cover approximately ________ percent of Earth's surface.

Accepted Answer

A)  40 
B)  50 
C)  60 
D)  70 
A)  40 
B)  50 
C)  60 
D)  70

Question 5

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

Accepted Answer

The answer of ________ continental margins typically exhibit wide, extensive,...

Question 6

The gently sloping submerged surface extending from the shoreline toward the deep ocean is termed the ________.

Accepted Answer

The answer of The gently sloping submerged surface extending from...

Question 7

Concerning the distribution of land and water, which of the following statements is true?

Accepted Answer

A)  The percentage of land and water is about the same in both the Northern and Southern Hemispheres. 
B)  The Southern Hemisphere has much more water surface than the Northern Hemisphere. 
C)  The Northern Hemisphere has much more water surface than the Southern Hemisphere. 
D)  None of the above is true. 
A)  The percentage of land and water is about the same in both the Northern and Southern Hemispheres. 
B)  The Southern Hemisphere has much more water surface than the Northern Hemisphere. 
C)  The Northern Hemisphere has much more water surface than the Southern Hemisphere. 
D)  None of the above is true.

Question 8

Word Analysis. Examine the words and/or phrases for each question below and determine the relationship among the majority of words/phrases. Choose the option which does not fit the pattern.

Accepted Answer

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

Question 9

Manganese nodules do not accumulate below 4500 meters depth because the manganese minerals are highly soluble in seawater below that depth.

Accepted Answer

A) True 
 B)False

Question 10

Seamounts ________.

Accepted Answer

A)  are a special type of oceanic trench 
B)  are volcanoes that form on the ocean floor 
C)  form only in the Pacific Ocean basin 
D)  are submarine canyons found near Australia 
A)  are a special type of oceanic trench 
B)  are volcanoes that form on the ocean floor 
C)  form only in the Pacific Ocean basin 
D)  are submarine canyons found near Australia

Question 11

How might you distinguish an ancient passive continental margin from an active continental margin? What geologic features or rock sequences would be unique to each one? Also, what features of modern continental margins may not be preserved in the geologic record?

Accepted Answer

An ancient passive continental margin ca

Question 12

The west coast of South America and the east coast of North America have very different continental margins.

Accepted Answer

A) True 
 B)False

Question 13

The ________ Ocean has more extensive abyssal plains than the Pacific Ocean because it has fewer trenches to trap sediments moving down the continental slope.

Accepted Answer

A)  Indian 
B)  Atlantic 
C)  Arctic 
D)  none of these 
A)  Indian 
B)  Atlantic 
C)  Arctic 
D)  none of these

Question 14

Examine Figure 13.C from Earth Science, 12e below. Briefly explain the main points of Charles Darwin's hypothesis on coral atoll formation. Have we tested his hypothesis and is it still thought to be correct today? Can you think of another possible explanation that would explain the origin of such coral atolls?

Accepted Answer

The answer of Examine Figure 13.C from Earth Science, 12e...

Question 15

How do calcareous oozes form?

Accepted Answer

A)  The particles are precipitated in warm surface waters and sink to the bottom. 
B)  The particles are precipitated by bottom-dwelling organisms. 
C)  The particles are precipitated in the water column below the depth of sunlight penetration and then sink to the bottom. 
D)  The particles settle out from calcite-rich turbidity currents at depths greater than 15,000 feet. 
A)  The particles are precipitated in warm surface waters and sink to the bottom. 
B)  The particles are precipitated by bottom-dwelling organisms. 
C)  The particles are precipitated in the water column below the depth of sunlight penetration and then sink to the bottom. 
D)  The particles settle out from calcite-rich turbidity currents at depths greater than 15,000 feet.

Question 16

________ develop where oceanic lithosphere bends downward and sinks into the mantle.

Accepted Answer

A)  Submarine canyons 
B)  Abyssal seamounts 
C)  Deep ocean trenches 
D)  Rift valleys on mid-ocean ridges 
A)  Submarine canyons 
B)  Abyssal seamounts 
C)  Deep ocean trenches 
D)  Rift valleys on mid-ocean ridges

Question 17

Submarine canyons found on the continental slope are believed to have been created ________.

Accepted Answer

A)  by rivers during the ice age 
B)  by faulting 
C)  because of a plate plunging into the mantle 
D)  none of these 
A)  by rivers during the ice age 
B)  by faulting 
C)  because of a plate plunging into the mantle 
D)  none of these

Question 18

Matching. Match the ocean floor sediment with each phrase.
-diatom ooze

Accepted Answer

A) biogenous 
B) terrigenous 
C) hydrogenous 
A) biogenous 
B) terrigenous 
C) hydrogenous

Question 19

An echo sounder operates by measuring the time required for a ________.

Accepted Answer

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

Question 20

Which ocean has the greatest average depth?

Accepted Answer

A)  Atlantic 
B)  Pacific 
C)  Indian 
D)  Arctic 
A)  Atlantic 
B)  Pacific 
C)  Indian 
D)  Arctic

Exam 13: The Ocean Floor

A prominent feature of the Mid-Atlantic Ridge is a very deep linear valley known as a(n) ________ valley.

The ________ Ocean is largest.

________ sediment consists of shells and hard parts of marine organisms.

The oceans cover approximately ________ percent of Earth's surface.

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

The gently sloping submerged surface extending from the shoreline toward the deep ocean is termed the ________.

Concerning the distribution of land and water, which of the following statements is true?

Word Analysis. Examine the words and/or phrases for each question below and determine the relationship among the majority of words/phrases. Choose the option which does not fit the pattern.

Manganese nodules do not accumulate below 4500 meters depth because the manganese minerals are highly soluble in seawater below that depth.

Seamounts ________.

How might you distinguish an ancient passive continental margin from an active continental margin? What geologic features or rock sequences would be unique to each one? Also, what features of modern continental margins may not be preserved in the geologic record?

The west coast of South America and the east coast of North America have very different continental margins.

The ________ Ocean has more extensive abyssal plains than the Pacific Ocean because it has fewer trenches to trap sediments moving down the continental slope.

How do calcareous oozes form?

________ develop where oceanic lithosphere bends downward and sinks into the mantle.

Submarine canyons found on the continental slope are believed to have been created ________.

Matching. Match the ocean floor sediment with each phrase. -diatom ooze

An echo sounder operates by measuring the time required for a ________.

Which ocean has the greatest average depth?

Introduction to Earth Science

Minerals: Building Blocks of Rocks

Rocks: Materials of the Solid Earth

Weathering, Soil, and Mass Wasting

Running Water and Groundwater

Glaciers, Deserts, and Winds

Plate Tectonics: a Scientific Theory Unfolds

Earthquakes and Earths Interior

Volcanoes and Other Igneous Activity

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 Weather

Climate

Origin of Modern Astronomy

Touring Our Solar System

Light, Astronomical Observations, and the Sun

Beyond Our Solar System

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