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Plate Tectonics Review-PCUE

Total questions: 28

Worksheet time: 14mins

Name
Class
Date
1.
1. Earth’s crust would be best modeled by using a material that is
a)
a. liquid and hot
b)
b. dense and smooth
c)
c. soft and flexible
d)
d. thin and solid
2.
2. Which one of the following statements is TRUE?
a)
a. The earth’s crust moves around but is never destroyed.
b)
b. Old crust is destroyed into the mantle and new crust is formed over time.
c)
c. Old crust is broken down into sand.
d)
d. All of the above.
3.
3. Heat from deep in Earth’s interior is transferred to its crust by which of the following?
a)
a. conduction in the ocean
b)
b. convection in the mantle
c)
c. radiation from the solid core
d)
d. evaporation at mid-ocean ridges
4.
4. Seafloor spreading provides evidence of which of the following Earth processes?
a)
a. erosion of coastlines
b)
b. weathering of mountains
c)
c. movement of crustal plates
d)
d. formation of sedimentary rock
5.
5. Which of the following are formed when two continental plates collide with one another?
a)
a. hot spots
b)
b. rift valleys
c)
c. mountain ranges
d)
d. mid-ocean ridges
6.
6. Scientists claim that the continents of South America and Africa were once a single landmass. All of the following observations support this claim EXCEPT
a)
a. the mountains on these continents have similar rocks of the same age
b)
b. these continents appear to fit together like the pieces of a puzzle
c)
c. similar fish live in the ocean off the coasts of these continents
d)
d. the same kinds of fossils have been found on these continents
7.
7. The maps below show the positions of two continents at two different times. The movement of the two continents as shown may best be explained by
a)
a. volcanic eruptions
b)
b. magnetic changes
c)
c. coastal flooding
d)
d. plate tectonics
8.
8. The “Ring of Fire” is a long chain of volcanoes that encircles the Pacific Ocean. Which of the following is the best explanation for the arrangement of these volcanoes?
a)
a. They outline the crater caused by the impact of an asteroid.
b)
b. They follow the shape of the adjacent tectonic plates under the sea.
c)
c. One volcano usually triggers a second volcano with its hot magma.
d)
d. Volcanoes always form in rings because of underwater convection currents.
9.
9. Plate tectonics refers to the theory that
a)
a. the continents float on the oceans
b)
b. the crust was hot, then it cooled to form continents, mountains, and oceans
c)
c. the surface of the earth is made up of large plates that move over time
d)
d. All of the above.
10.
10. Which of the following statements provides evidence for continental drift?
a)
a. The same kind of unusual fossils are found in South America and Africa.
b)
b. The same kind of unusual rock layers are found in North America, Europe, and Africa.
c)
c. The earth’s continents are moving at a rate of 2.5 centimeters per year.
d)
d. All of the above.
11.
11. A rift valley is evidence of which kind of plate boundary?
a)
a. convergent
b)
b. divergent
c)
c. transform
d)
d. uniform
12.
12. What do scientists believe is the force behind the plate tectonics theory?
a)
a. the sun’s gravity
b)
b. gravity slab pull
c)
c. convection currents
d)
d. rotation of Earth on its axis
13.
13. Examine the diagram. Which of the following best describes the age of the ocean floor?
a)
a. Oldest at Points A and B, youngest in the middle
b)
b. Oldest at Point A, youngest at Point B
c)
c. Oldest at Point B, youngest at Point A
d)
d. Oldest in the middle, youngest at Points A and B
14.
14. What type of plate boundary is shown in the diagram?
a)

a. convergent

b)

b. divergent

c)

c. transform

d)

d. uniform

15.
15. Look at the part of the diagram labeled with a star. What process is occurring here?
a)

a. uprising of convection currents

b)

b. subduction of the oceanic plate

c)

c. subduction of the continental plate

d)

d. sea-floor spreading

16.
16. What will happen to the oceanic crust plate?
a)

a. it will become a part of the hot, molten mantle

b)

b. it will go above the continental crust

c)

c. it will undergo the weathering process

d)

d. it will become solid rock

17.
17. What process is best represented by the arrows in the diagram?
a)

a. earthquakes

b)

b. convection within the mantle

c)

c. weathering of rock

d)

d. water movement in the mantle

18.
18. Which of the following best explains the motion represented by the arrows?
a)

a. Rock is heated near the core at Point A, and therefore becomes less dense. It rises towards Point B. As it moves from Point B to Point C, it is cooled and becomes denser, so it sinks at Point D.

b)

b. Rock is cooled near the core at Point A, and therefore becomes more dense. It rises towards Point B. As it moves from Point B to Point C, it is heated and becomes less dense, so it sinks at Point D.

c)

c. Rock is heated near the core at Point A, and therefore becomes more dense. It rises towards Point B. As it moves from Point B to Point C, it is cooled and becomes less dense, so it sinks at Point D.

d)

d. Rock is heated near the core at Point A, and therefore becomes less dense. It rises towards Point B. As it moves from Point B to Point C, it is cooled and becomes less dense, so it sinks at Point D.

19.
19. Which of the following is the most likely to result at a divergent boundary?
a)
d. both b. and c.
b)
a. earthquakes
c)
b. rift valley
d)
c. mid-ocean ridge
e)
e. both a. and b.
20.
20. There are long mountain belts that divide the sea floor and generate new sea floor as magma rises and erupts onto Earth’s surface. What are these mountain belts known as?
a)
a. magnetic poles
b)
b. mid-ocean ridges
c)
c. ocean magma trenches
d)
d. ocean magma hills
21.
21. What is the type of plate boundary is most likely to result in Earth’s crust going through the process of subduction?
a)
a. transform plate boundary
b)
b. divergent plate boundary
c)
c. uniform boundary
d)
d. convergent plate boundary
22.
22. Which of the following does NOT describe a fault zone?
a)
a. An area that would indicate the presence of a transform fault.
b)
b. An area of many fractured pieces of crust along a large fault
c)
c. An area where magma erupts through the crust creating new crust
d)
d. An area where earthquakes are common
23.
23. Seafloor spreading is caused by which type of plate boundary?
a)
a. oceanic crust diverging
b)
b. oceanic crust converging with continental crust
c)
c. oceanic crust converging
d)
d. continental crust diverging
24.
24. An image of the relative motion at a plate boundary is shown. What event will occur at the boundary shown?
a)

a. mountain formation

b)

b. earthquakes

c)

c. trench or rift valley formation

d)

d. volcanic island formation

25.
25. What type of boundary is shown in the diagram?
a)

a. transform

b)

b. divergent

c)

c. convergent

d)

d. subduction

26.
26a. Name two geologic features found on Earth’s surface that were caused by the movement of crustal plates.
4 lines
27.
26b. For each of the features that you named in 26a, describe how the movement of crustal plates caused the feature to form on Earth’s surface.
4 lines
28.
27. Explain three pieces of evidence that lead us to believe many continents were once connected.
4 lines

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