Plate Tectonics Answers

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During the process of mountain building, earthquakes sometimes occur along continental-continental convergent boundaries. Which statement best describes the motion of the plates along these boundaries that causes the earthquakes?

A
The plates push apart from each other with no subduction.
B
Subduction occurs with the less-dense plate sinking below the other plate.
C
Subduction occurs with the more-dense plate sinking below the other plate.
D
The plates smash together with no subduction.
2
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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
3

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
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

Study the map.Which plate borders the Philippine Plate?

Question illustration
A
African
B
Antarctic
C
Eurasian
D
North American
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 this image.

Question illustration
A
mountains
B
rift valleys
C
volcanoes
D
island chains
9

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.
10

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

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