Question 1

The most obvious evidence of a plate boundary where two plates move apart isare_______.

Accepted Answer

A)  strike- slip faults on the sea floor 
B)  mountain building along the plate boundary 
C)  upwelling of hot material from the mantle 
D)  earthquakes 
A)  strike- slip faults on the sea floor 
B)  mountain building along the plate boundary 
C)  upwelling of hot material from the mantle 
D)  earthquakes

Question 2

The figure below shows a_______ boundary.

Accepted Answer

A)  transform 
B)  divergent 
C)  convergent 
D)  hot spot 
A)  transform 
B)  divergent 
C)  convergent 
D)  hot spot

Question 3

Oceanic lithosphere subducts sinks into the asthenosphere. because_______ .

Accepted Answer

A)  the convection of the mantle pulls the lithosphere into the asthenosphere 
B)  old oceanic lithosphere is more dense that the asthenosphere 
C)  the upwelling magma at divergent boundaries pushes the lithospheric plate into the asthenosphere 
D)  the pressure from two plates colliding forces one plate into the asthenosphere 
A)  the convection of the mantle pulls the lithosphere into the asthenosphere 
B)  old oceanic lithosphere is more dense that the asthenosphere 
C)  the upwelling magma at divergent boundaries pushes the lithospheric plate into the asthenosphere 
D)  the pressure from two plates colliding forces one plate into the asthenosphere

Question 4

The_______ is an example of an active, continent- continent collision.

Accepted Answer

A)  northern movement of Baja California and a sliver of western California toward the Hawaiian Islands 
B)  westward movement of the South American plate over the Nazca plate 
C)  northward movement of India into Eurasia 
D)  Arabian Peninsula slamming into North Africa under the Red Sea 
A)  northern movement of Baja California and a sliver of western California toward the Hawaiian Islands 
B)  westward movement of the South American plate over the Nazca plate 
C)  northward movement of India into Eurasia 
D)  Arabian Peninsula slamming into North Africa under the Red Sea

Question 5

Oceanic island arcs are similar to continental volcanic arcs in that_______ .

Accepted Answer

A)  continental arcs make islands that are arc- shaped 
B)  oceanic island arcs form on continents when oceanic lithosphere is subducted 
C)  oceanic islands arcs form by the same mechanism as continental arcs 
D)  major continental mountain ranges formed from island arcs 
A)  continental arcs make islands that are arc- shaped 
B)  oceanic island arcs form on continents when oceanic lithosphere is subducted 
C)  oceanic islands arcs form by the same mechanism as continental arcs 
D)  major continental mountain ranges formed from island arcs

Question 6

Wegener suggested that the_______ .

Accepted Answer

A)  continental lithosphere was heavier than oceanic lithosphere 
B)  oceanic lithosphere was heavier than continental lithosphere 
C)  thick continents moved through the thinner ocean crust. 
D)  asthenosphere was molten 
A)  continental lithosphere was heavier than oceanic lithosphere 
B)  oceanic lithosphere was heavier than continental lithosphere 
C)  thick continents moved through the thinner ocean crust. 
D)  asthenosphere was molten

Question 7

Which one of the following is an important fundamental assumption underlying the plate tectonic theory?

Accepted Answer

A)  Earth's magnetic field originates in the outer core. 
B)  Radioactive decay slows down at the extreme pressures of the inner core. 
C)  Earth's ocean basins are very old and stable features. 
D)  Earth's surface area has been essentially constant over time. 
A)  Earth's magnetic field originates in the outer core. 
B)  Radioactive decay slows down at the extreme pressures of the inner core. 
C)  Earth's ocean basins are very old and stable features. 
D)  Earth's surface area has been essentially constant over time.

Question 8

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)  island arc 
B)  subduction 
C)  volcanic arc 
D)  Hawaii 
A)  island arc 
B)  subduction 
C)  volcanic arc 
D)  Hawaii

Question 9

All of the following are evidence supporting the theory of plate tectonics except for_______ .

Accepted Answer

A)  ocean floor drilling 
B)  hot spots 
C)  paleomagnetism 
D)  changes in the Moon's orbit due to shifting plates 
A)  ocean floor drilling 
B)  hot spots 
C)  paleomagnetism 
D)  changes in the Moon's orbit due to shifting plates

Question 10

Below is an image of the plates and continents   What is true of this map?

Accepted Answer

A)  It illustrates plate tectonics because it is possible for a separate unit to consist of both continental and ocean basin. 
B)  It illustrates plate tectonics because each continent moves as a separate unit. 
C)  It illustrates continental drift because it is possible for a separate unit to consist of both continental and ocean basin. 
D)  It illustrates continental drift because each continent moves as a separate unit. 
A)  It illustrates plate tectonics because it is possible for a separate unit to consist of both continental and ocean basin. 
B)  It illustrates plate tectonics because each continent moves as a separate unit. 
C)  It illustrates continental drift because it is possible for a separate unit to consist of both continental and ocean basin. 
D)  It illustrates continental drift because each continent moves as a separate unit.

Question 11

A very long- lived magma source located deep in the mantle is called a_______ .

Accepted Answer

A)  melt well 
B)  magma welt 
C)  hot spot 
D)  basalt spout 
A)  melt well 
B)  magma welt 
C)  hot spot 
D)  basalt spout

Question 12

Why do scientists think that lithosphere has to be destroyed somewhere on or in the earth?

Accepted Answer

A)  There is not enough lithosphere on the earth to account for what has been produced in the last 200 million years. 
B)  The earth is getting smaller as the new oceanic crust cools and contracts. 
C)  The moon is moving away from the earth and this would not happen if the earth had more lithosphere to increase its mass. 
D)  Lithosphere is created at divergent boundaries and the earth is not getting any larger. 
A)  There is not enough lithosphere on the earth to account for what has been produced in the last 200 million years. 
B)  The earth is getting smaller as the new oceanic crust cools and contracts. 
C)  The moon is moving away from the earth and this would not happen if the earth had more lithosphere to increase its mass. 
D)  Lithosphere is created at divergent boundaries and the earth is not getting any larger.

Question 13

When two continents converge, _______ .

Accepted Answer

A)  the sediments trapped between them are pushed up and deformed to make a mountain range 
B)  the heavier continent is subducted 
C)  the lighter continent is subducted 
D)  a volcanic arc forms on the upper plate 
A)  the sediments trapped between them are pushed up and deformed to make a mountain range 
B)  the heavier continent is subducted 
C)  the lighter continent is subducted 
D)  a volcanic arc forms on the upper plate

Question 14

Oceanic ridges are _______ than most mountain belts.

Accepted Answer

A)  narrower 
B)  taller 
C)  shorter 
D)  wider 
A)  narrower 
B)  taller 
C)  shorter 
D)  wider

Question 15

Oceanic crust has a_______ composition and therefore is _______than continental crust.

Accepted Answer

A)  mafic; lighter 
B)  mafic; heavier 
C)  felsic; heavier 
D)  felsic; lighter 
A)  mafic; lighter 
B)  mafic; heavier 
C)  felsic; heavier 
D)  felsic; lighter

Question 16

The San Andreas Fault zone in California is an example of_______.

Accepted Answer

A)  a divergent plate boundary 
B)  an ocean- continent collision 
C)  a transform plate boundary 
D)  a continental rift 
A)  a divergent plate boundary 
B)  an ocean- continent collision 
C)  a transform plate boundary 
D)  a continental rift

Question 17

Which ocean formed as a direct result of the breakup of Pangaea?

Accepted Answer

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

Question 18

The lithosphere is the outer layer of the earth characterized by_______ .

Accepted Answer

A)  soft rocks that flow easily 
B)  magma 
C)  layers of both hard and soft rocks 
D)  hard rocks that break 
A)  soft rocks that flow easily 
B)  magma 
C)  layers of both hard and soft rocks 
D)  hard rocks that break

Question 19

Continental rifts_______ .

Accepted Answer

A)  always proceed to completion begin from crustal thinning 
B)  could produce linear seas 
C)  cannot occur, only oceanic crust can have rifts 
D)  cannot turn into ocean basins 
A)  always proceed to completion begin from crustal thinning 
B)  could produce linear seas 
C)  cannot occur, only oceanic crust can have rifts 
D)  cannot turn into ocean basins

Question 20

All of Earth's ocean basins are_______ .

Accepted Answer

A)  less than 2 million years old 
B)  less than 2000 million years old 
C)  less than 20 million years old 
D)  less than 200 million years old 
A)  less than 2 million years old 
B)  less than 2000 million years old 
C)  less than 20 million years old 
D)  less than 200 million years old

Exam 4: Plate Tectonics: a Scientific Revolution Unfolds

The most obvious evidence of a plate boundary where two plates move apart isare_______.

The figure below shows a_______ boundary.

Oceanic lithosphere subducts sinks into the asthenosphere. because_______ .

The_______ is an example of an active, continent- continent collision.

Oceanic island arcs are similar to continental volcanic arcs in that_______ .

Wegener suggested that the_______ .

Which one of the following is an important fundamental assumption underlying the plate tectonic theory?

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.

All of the following are evidence supporting the theory of plate tectonics except for_______ .

Below is an image of the plates and continents What is true of this map?

A very long- lived magma source located deep in the mantle is called a_______ .

Why do scientists think that lithosphere has to be destroyed somewhere on or in the earth?

When two continents converge, _______ .

Oceanic ridges are _______ than most mountain belts.

Oceanic crust has a_______ composition and therefore is _______than continental crust.

The San Andreas Fault zone in California is an example of_______.

Which ocean formed as a direct result of the breakup of Pangaea?

The lithosphere is the outer layer of the earth characterized by_______ .

Continental rifts_______ .

All of Earth's ocean basins are_______ .

Introduction to Earth Science

Matter and Minerals

Rocks: Materials of the Solid Earth

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

The Ocean Floor

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

Oceanic crust has a_ composition and therefore is _than continental crust.