Question 1

The crests of mid-oceanic ridges are associated with ____.

Accepted Answer

A) pelagic sediments 
B) barrier reefs 
C) rift valleys 
D) abyssal plains 
E) Benioff zones 
A) pelagic sediments 
B) barrier reefs 
C) rift valleys 
D) abyssal plains 
E) Benioff zones

Question 2

_______ is an island on a mid-oceanic ridge.

Accepted Answer

A) Madagascar 
B) Japan 
C) Cuba 
D) Hawaii 
E) Iceland 
A) Madagascar 
B) Japan 
C) Cuba 
D) Hawaii 
E) Iceland

Question 3

Oceans cover _____ percent of the Earth's surface.

Accepted Answer

A) 70 
B) 90 
C) 80 
D) 60 
E) 50 
A) 70 
B) 90 
C) 80 
D) 60 
E) 50

Question 4

Turbidity currents are great masses of sediment-laden water that are pulled downhill by ____.

Accepted Answer

A) landslides 
B) submarine canyons 
C) gravity 
D) earthquakes,storms,volcanic eruptions 
E) Earth's rotation 
A) landslides 
B) submarine canyons 
C) gravity 
D) earthquakes,storms,volcanic eruptions 
E) Earth's rotation

Question 5

Project FAMOUS used submersibles to study ______.

Accepted Answer

A) trenches 
B) mid-ocean ridges 
C) guyots 
D) reefs 
E) continental rises 
A) trenches 
B) mid-ocean ridges 
C) guyots 
D) reefs 
E) continental rises

Question 6

Ophiolitic sediment is composed of wind-blown dust and microscopic skeletons that settle slowly to the sea floor.

Accepted Answer

A) True 
 B)False

Question 7

The abyssal plains are formed of _____.

Accepted Answer

A) sediment from meteoric dust 
B) pillow basalts 
C) mid-oceanic ridges 
D) horizontal layers of sediment 
E) volcanic ash 
A) sediment from meteoric dust 
B) pillow basalts 
C) mid-oceanic ridges 
D) horizontal layers of sediment 
E) volcanic ash

Question 8

Most geologists think that the flat summits of seamounts ___.

Accepted Answer

A) are uplifted sea floor 
B) were eroded flat by wave action 
C) are fault surfaces 
D) are remnants of the continental shelf 
E) are remnants of plateau basalts 
A) are uplifted sea floor 
B) were eroded flat by wave action 
C) are fault surfaces 
D) are remnants of the continental shelf 
E) are remnants of plateau basalts

Question 9

These machines can take geologists to many parts of the sea floor to observe,photograph,and sample rock and sediment.

Accepted Answer

A) deep sea drilling platforms 
B) submersibles 
C) sonar 
D) echo sounder 
E) multibeam sonar 
A) deep sea drilling platforms 
B) submersibles 
C) sonar 
D) echo sounder 
E) multibeam sonar

Question 10

Ocean water originated mainly from degassing of the Earth's interior.

Accepted Answer

A) True 
 B)False

Question 11

Geologists' ideas about the composition of ocean crust are greatly influenced by the study of ____.

Accepted Answer

A) ophiolites 
B) continental volcanoes 
C) chert 
D) the Mohorovicic discontinuity 
E) the asthenosphere 
A) ophiolites 
B) continental volcanoes 
C) chert 
D) the Mohorovicic discontinuity 
E) the asthenosphere

Question 12

This instrument works on essentially the same principles as echo sounder but can penetrate the bottom of the sea floor and provides more information.

Accepted Answer

A) multibeam sonar 
B) single beam sonar 
C) seismic refraction profiler 
D) seismic reflection profiler 
E) sonar profiler 
A) multibeam sonar 
B) single beam sonar 
C) seismic refraction profiler 
D) seismic reflection profiler 
E) sonar profiler

Question 13

Abyssal fans are made up of _____ sediment that has moved down submarine canyons

Accepted Answer

A) abyssal 
B) continental slope 
C) deep sea 
D) marine pelagic 
E) land-derived 
A) abyssal 
B) continental slope 
C) deep sea 
D) marine pelagic 
E) land-derived

Question 14

Passive margins are found on the edges of most of the landmasses bordering the Pacific Ocean.

Accepted Answer

A) True 
 B)False

Question 15

Continental slopes are often marked by lines of hot springs that precipitate metals.

Accepted Answer

A) True 
 B)False

Question 16

The continental rise is a wedge of sediment that extends from the lower part of the continent slope to the deep-sea floor.

Accepted Answer

A) True 
 B)False

Question 17

The island of Iceland appears to be an exposed section of the Atlantic mid-oceanic ridge.

Accepted Answer

A) True 
 B)False

Question 18

_____ are major lines of weakness in Earth's crust that cross the mid-oceanic ridge at right angles.

Accepted Answer

A) Abyssal fans 
B) Fracture zones 
C) Submarine canyons 
D) Transform faults 
E) Fold belts 
A) Abyssal fans 
B) Fracture zones 
C) Submarine canyons 
D) Transform faults 
E) Fold belts

Question 19

The study of _____ rocks,sediment,and topography provided most of the information that led to the concept of plate tectonics.

Accepted Answer

A) seafloor 
B) ocean boundaries containing 
C) continental interior 
D) mid-oceanic ridge 
E) abyssal plains 
A) seafloor 
B) ocean boundaries containing 
C) continental interior 
D) mid-oceanic ridge 
E) abyssal plains

Question 20

The ____ is a shallow submarine platform at the edge of a continent.

Accepted Answer

A) abyssal plain 
B) continental shelf 
C) aseismic ridge 
D) rise 
E) trench 
A) abyssal plain 
B) continental shelf 
C) aseismic ridge 
D) rise 
E) trench

Exam 3: The Sea Floor

The crests of mid-oceanic ridges are associated with ____.

_______ is an island on a mid-oceanic ridge.

Oceans cover _____ percent of the Earth's surface.

Turbidity currents are great masses of sediment-laden water that are pulled downhill by ____.

Project FAMOUS used submersibles to study ______.

Ophiolitic sediment is composed of wind-blown dust and microscopic skeletons that settle slowly to the sea floor.

The abyssal plains are formed of _____.

Most geologists think that the flat summits of seamounts ___.

These machines can take geologists to many parts of the sea floor to observe,photograph,and sample rock and sediment.

Ocean water originated mainly from degassing of the Earth's interior.

Geologists' ideas about the composition of ocean crust are greatly influenced by the study of ____.

This instrument works on essentially the same principles as echo sounder but can penetrate the bottom of the sea floor and provides more information.

Abyssal fans are made up of _____ sediment that has moved down submarine canyons

Passive margins are found on the edges of most of the landmasses bordering the Pacific Ocean.

Continental slopes are often marked by lines of hot springs that precipitate metals.

The continental rise is a wedge of sediment that extends from the lower part of the continent slope to the deep-sea floor.

The island of Iceland appears to be an exposed section of the Atlantic mid-oceanic ridge.

_____ are major lines of weakness in Earth's crust that cross the mid-oceanic ridge at right angles.

The study of _____ rocks,sediment,and topography provided most of the information that led to the concept of plate tectonics.

The ____ is a shallow submarine platform at the edge of a continent.

Introducing Geology,the Essentials of Plate Tectonics,and Other Important Concepts

Earths Interior and Geophysical Properties

Plate Tectonics

Mountain Belts and the Continental Crust

Geologic Structures

Earthquakes

Time and Geology

Atoms,Elements and Minerals

Volcanism and Extrusive Rocks

Igneous Rocks, Intrusive Activity, and the Origin of Igneous Rocks

Weathering and Soil

Mass Wasting

Sediment and Sedimentary Rocks

Metamorphism, Metamorphic Rocks, and Hydrothermal Rocks

Streams and Floods

Ground Water

Deserts and Wind Action

Glaciers and Glaciation

Waves,Beaches and Coasts

Geologic Resources

The Earths Companions

Filters