Question 1

Oceanic island arcs are similar to continental volcanic arcs in that ________.

Accepted Answer

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

Question 2

What was the main view how the world worked geologically prior to the 1960s?

Accepted Answer

A) It was generally believed that the earth was flat. 
B) It was generally believed that mountains were produced by vertical forces. 
C) It was generally believed that continents and oceans moved. 
D) It was generally believed that oceans formed as a result of meteorite impacts. 
A) It was generally believed that the earth was flat. 
B) It was generally believed that mountains were produced by vertical forces. 
C) It was generally believed that continents and oceans moved. 
D) It was generally believed that oceans formed as a result of meteorite impacts.

Question 3

oceanic ridge seafloor spreading arc volcanoes divergent

Accepted Answer

The answer of oceanic ridge seafloor spreading arc volcanoes divergent...

Question 4

New York and London are on two separate plates so the distance between the cities is ________.

Accepted Answer

A) stationary 
B) increasing 
C) decreasing 
D) always changing direction 
A) stationary 
B) increasing 
C) decreasing 
D) always changing direction

Question 5

Plate Tectonic boundaries were first identified by ________.

Accepted Answer

A) mapping the mountain chains 
B) mapping subduction zone 
C) mapping earthquakes and volcanoes 
D) mapping continental margins 
A) mapping the mountain chains 
B) mapping subduction zone 
C) mapping earthquakes and volcanoes 
D) mapping continental margins

Question 6

A major problem with Wegener's Continental Drift Hypothesis was that he could not find rocks or other geologic features that would have been continuous from one continent to the next if the continents had been together.

Accepted Answer

A) True 
 B)False

Question 7

Which of the following major discoveries was not made near or after World War II?

Accepted Answer

A) the extensive ranges of mountain chains on the sea floor 
B) deep focus earthquakes that occur in some regions of the earth 
C) rift valleys in Africa 
D) the absence of rocks older than 200 million years on the sea floor 
A) the extensive ranges of mountain chains on the sea floor 
B) deep focus earthquakes that occur in some regions of the earth 
C) rift valleys in Africa 
D) the absence of rocks older than 200 million years on the sea floor

Question 8

Volcanoes form above subduction zones because ________.

Accepted Answer

A) the subducting lithosphere melts as it descends and the magma rises to form volcanoes 
B) the lithosphere thickens above the subducting lithosphere and causes volcanoes to form 
C) the asthenosphere is displaced by the subducting lithosphere and rises to the surface to form volcanoes 
D) water is squeezed out of the subducting slab and the water triggers melting of the overlying asthenosphere 
A) the subducting lithosphere melts as it descends and the magma rises to form volcanoes 
B) the lithosphere thickens above the subducting lithosphere and causes volcanoes to form 
C) the asthenosphere is displaced by the subducting lithosphere and rises to the surface to form volcanoes 
D) water is squeezed out of the subducting slab and the water triggers melting of the overlying asthenosphere

Question 9

Explain why the Mesosaurus was a good example to support Wegener's ideas.

Accepted Answer

Mesosaurus fossils were only found in a

Question 10

Alfred Wegener developed the theory of Plate Tectonics.

Accepted Answer

A) True 
 B)False

Question 11

A map of the ages of the sea floor shows ________.

Accepted Answer

A) the direction of the plate motions 
B) the location of modern plate boundaries 
C) how much material was produced at the ridges during a given period of time 
D) how fast the plates are moving 
A) the direction of the plate motions 
B) the location of modern plate boundaries 
C) how much material was produced at the ridges during a given period of time 
D) how fast the plates are moving

Question 12

Oceanic crust has a mafic composition and therefore is denser than continental crust.

Accepted Answer

A) True 
 B)False

Question 13

Fracture zone associated with transform boundaries are ________.

Accepted Answer

A) active faults 
B) inactive faults 
C) fractures in the seafloor that did not become faults 
D) topographic markers of where Pangaea originally broke apart 
A) active faults 
B) inactive faults 
C) fractures in the seafloor that did not become faults 
D) topographic markers of where Pangaea originally broke apart

Question 14

All of the earth's ocean basins are ________.

Accepted Answer

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

Question 15

Briefly explain how magnetic patterns on the seafloor support Plate Tectonic theory.

Accepted Answer

the magnetic patterns of highs and lows

Question 16

Apparent changes in the position of the magnetic pole measured in rocks in Europe is attributed to ________.

Accepted Answer

A) changes in the solar flux 
B) movement of lithospheric plates 
C) polar wandering 
D) random magnetic reversals 
A) changes in the solar flux 
B) movement of lithospheric plates 
C) polar wandering 
D) random magnetic reversals

Question 17

Wegener thought that ________.

Accepted Answer

A) there were once two big continents that were separated later by the Atlantic Ocean 
B) there was once one big continent that was later separated by the Atlantic Ocean 
C) there was once one big continent that later broke into several pieces 
D) there were once several continents that recombined to form the continents we have today 
A) there were once two big continents that were separated later by the Atlantic Ocean 
B) there was once one big continent that was later separated by the Atlantic Ocean 
C) there was once one big continent that later broke into several pieces 
D) there were once several continents that recombined to form the continents we have today

Question 18

Iceland is a good example of an island arc,formed from an oceanic-oceanic plate collision.

Accepted Answer

A) True 
 B)False

Question 19

Earth's radius and surface area are slowly increasing to accommodate the new oceanic crust being formed at mid-ocean ridges.

Accepted Answer

A) True 
 B)False

Question 20

A transform boundary is characterized by ________.

Accepted Answer

A) a deep,vertical fault along which two plates slide past one another in opposite directions 
B) stratovolcanoes on the edge of a plate and shield volcanoes on the adjacent plate 
C) two converging oceanic plates meeting head-on and piling up into a mid-ocean ridge 
D) a divergent boundary where the continental plate changes to an oceanic plate 
A) a deep,vertical fault along which two plates slide past one another in opposite directions 
B) stratovolcanoes on the edge of a plate and shield volcanoes on the adjacent plate 
C) two converging oceanic plates meeting head-on and piling up into a mid-ocean ridge 
D) a divergent boundary where the continental plate changes to an oceanic plate

Exam 7: Plate Tectonics: a Scientific Revolution Unfolds

Oceanic island arcs are similar to continental volcanic arcs in that ________.

What was the main view how the world worked geologically prior to the 1960s?

oceanic ridge seafloor spreading arc volcanoes divergent

New York and London are on two separate plates so the distance between the cities is ________.

Plate Tectonic boundaries were first identified by ________.

A major problem with Wegener's Continental Drift Hypothesis was that he could not find rocks or other geologic features that would have been continuous from one continent to the next if the continents had been together.

Which of the following major discoveries was not made near or after World War II?

Volcanoes form above subduction zones because ________.

Explain why the Mesosaurus was a good example to support Wegener's ideas.

Alfred Wegener developed the theory of Plate Tectonics.

A map of the ages of the sea floor shows ________.

Oceanic crust has a mafic composition and therefore is denser than continental crust.

Fracture zone associated with transform boundaries are ________.

All of the earth's ocean basins are ________.

Briefly explain how magnetic patterns on the seafloor support Plate Tectonic theory.

Apparent changes in the position of the magnetic pole measured in rocks in Europe is attributed to ________.

Wegener thought that ________.

Iceland is a good example of an island arc,formed from an oceanic-oceanic plate collision.

Earth's radius and surface area are slowly increasing to accommodate the new oceanic crust being formed at mid-ocean ridges.

A transform boundary is characterized by ________.

Introduction to Earth Science

Matter and Minerals

Rocks: Materials of the Solid Earth

Weathering, soil, and Mass Wasting

Running Water and Groundwater

Glaciers, deserts, and Wind

Earthquakes and Earths Interior

Volcanoes and Other Igneous Activity

Crustal Deformation and Mountain Building

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 Weather

World Climates and Global Climate Change

Origin of Modern Astronomy

Touring Our Solar System

Light,astronomical Observations,and the Sun

Beyond Our Solar System

Filters