Plate Tectonics Answers

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Which region of Earth did John Tuzo Wilson believe was broken into plates?

A
lithosphere
B
outer core
C
lower mantle
D
asthenosphere
2
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Many more earthquakes occur along the San Andreas Fault in California than in other parts of the United States. Scientists claim that these earthquakes are caused by activity along a transform plate boundary.Which evidence would best support this claim?

A
Subduction causes new crust to form.
B
Subduction causes old crust to be destroyed.
C
Plates slip past each other at the boundary.
D
Plates collide with each other at the boundary.
3

Which statement describes John Tuzo Wilson’s contribution to the theory of plate tectonics?

A
He proposed that plates carry parts of the seafloor.
B
He theorized that pieces of Earth move for a limited time.
C
He suggested that the asthenosphere is broken into segments.
D
He observed seafloor cracks similar to existing cracks in the continents.
4

Into which layer of the Earth do plate boundaries extend?

A
outer core
B
lithosphere
C
lower mantle
D
asthenosphere
5

Study the image about convection currents.

Question illustration
A
1
B
2
C
3
D
4
6

Study this image.

Question illustration
A
A volcano is forming.
B
Plates are converging.
C
A rift valley is forming.
D
A transform boundary is occurring.
7

Occasionally earthquakes occur as a result of collisions along oceanic-continental convergent boundaries. Where do these earthquakes most likely occur?

A
on land but close to oceans
B
inland, far from the coast
C
in the middle of the oceans
D
anywhere there are mountains
8

Study the image of a plate boundary.

Question illustration
A
mountain
B
rift valley
C
earthquake
D
island chain
9

Which statement describes the process of subduction?

A
Convection currents cause two plates to move away from each other.
B
A plate slides beneath another plate due to convection currents and gravity.
C
Materials are heated and transferred within Earth’s interior by density.
D
Heat cycles in the mantle cause plates to constantly move.
10

Study the image.

Question illustration
A
A convergent boundary is formed.
B
Two plates are forming a divergent boundary.
C
Continental plates are sliding past each other.
D
Several mid-ocean ridges are formed on Earth’s surface.
11

Study this map of the world.

Question illustration
A
Indo-Australian
B
African
C
Pacific
D
Eurasian
12

Many earthquakes occur near mid-ocean ridges but do not destroy or form new crust. Instead, plates slip past each other. Which kind of boundary is found at these earthquake locations?

A
transform boundary between two ocean plates
B
transform boundary between two continental plates
C
convergent boundary between two ocean plates
D
convergent boundary between two continental plates
13

Use the earthquake distribution map and what you know about boundaries to answer the question.Studies have shown that there is a relationship between the type and location of boundaries and the distribution and depth of earthquakes along or near these boundaries. Many earthquakes, shown in the map as wide bands, occur along convergent areas. These areas experience varying depths of earthquakes.Where would oceanic-oceanic convergence most likely occur?

Question illustration
A
Nazca plate converging with the South America plate, forming the Andes mountains
B
Philippine plate converging with the Pacific plate, forming Mariana Islands in the Pacific Ocean
C
Juan de Fuca converging with the North American plate, forming the Cascade mountains
D
North America Plate converging with the Eurasian Plate, forming a mid-ocean ridge

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