Plate Tectonics Answers

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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.
3

Which statement describes transform boundaries?

A
Rift valleys are formed.
B
Mountains are created.
C
Faults form in the lithosphere.
D
Plates move toward each other.
4

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.
5

In which two places do divergent boundaries occur?

A
land and oceans
B
oceans and volcanoes
C
volcanoes and lower mantle
D
lower mantle and land
6

Study this image.

Question illustration
A
mountains
B
rift valleys
C
volcanoes
D
island chains
7

Study the image.

Question illustration
A
does not occur in oceans
B
may form rift valleys
C
is a type of convergent boundary
D
is a region where earthquakes occur
8

Which statement explains the relationship between the density of a material and its movement in Earth’s interior?

A
Cooler materials move from Earth’s mantle to the lithosphere.
B
Cooler materials are highly dense, causing them to sink to the outer core.
C
Warmer materials sink to the mantle because their density slowly decreases.
D
Warmer materials have a high density, causing them to rise to Earth’s surface.
9

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
10

Which describes the boundary where earthquake activity occurs along rift valleys?

A
divergent boundary in the ocean
B
divergent boundary on land
C
convergent boundary in the ocean
D
convergent boundary on land

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