Plate Tectonics Answers

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1
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Study the image of Earth’s interior.

Question illustration
A
how convection currents move in Earth’s interior
B
the location of heated material near Earth’s surface
C
where plates move as material cools in the outer core
D
why the densities of materials remain constant at different layers
2
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Where is a divergent boundary most likely to be found?

A
in the ocean where plates move away from each other
B
on land where plates slip past each other
C
in the ocean where plates do not move
D
on land where plates move towards each other
4

Study this map of the world.

Question illustration
A
Indo-Australian
B
African
C
Pacific
D
Eurasian
5

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.
6

Study the map.Which plate borders the Philippine Plate?

Question illustration
A
African
B
Antarctic
C
Eurasian
D
North American
7

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.
8

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.
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.
12

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
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
14

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
15

Use the images to answer the question.Where would you most likely find transform boundaries on an earthquake distribution map?

Question illustration
A
where earthquakes are shallow and weak
B
where earthquakes are shallow and powerful
C
where earthquakes are deep and weak
D
where earthquakes are deep and powerful
16

Which best explains why earthquakes sometimes occur in the same locations as mid-ocean ridges and rift valleys?

A
Plates bump as they slip past each other at convergent boundaries.
B
Plates get stuck as they move past each other at convergent boundaries.
C
Crust gets cracked and forms faults as plates collide along divergent plate boundaries.
D
Faults form because crust gets cracked when plates move apart along divergent plate boundaries.
17

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.
18

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
19

Into which layer of the Earth do plate boundaries extend?

A
outer core
B
lithosphere
C
lower mantle
D
asthenosphere
20

Study the image of a plate boundary.

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

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