Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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1.
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Tectonic plates consist of
a. | continental crust. | c. | both continental and oceanic crust. | b. | oceanic
crust. | d. | mesosphere. |
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2.
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Wegener thought that all the continents were once together in one large
continent called
a. | Gondwana. | c. | Eurasia. | b. | Laurasia. | d. | Pangaea. |
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3.
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New oceanic lithosphere forms as a result of
a. | sea-floor spreading. | c. | reverse polarity. | b. | normal polarity. | d. | continental
drift. |
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4.
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Evidence for sea-floor spreading has come from
a. | fossils in South America and Africa. | c. | ancient climatic
conditions. | b. | magnetic minerals on the ocean floor. | d. | the breakup of
Pangaea. |
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5.
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What is the outermost layer of the Earth called?
a. | core | c. | asthenosphere | b. | lithosphere | d. | mesosphere |
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6.
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What is the area where two tectonic plates meet called?
a. | a collision | c. | a boundary | b. | a mid-ocean ridge | d. | a rift zone |
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7.
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What type of boundary is formed when plates collide?
a. | convergent | c. | divergent | b. | horizontal | d. | transform |
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8.
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What type of boundary is formed when plates separate?
a. | convergent | c. | divergent | b. | horizontal | d. | transform |
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9.
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What type of boundary is formed when plates slide past each other?
a. | convergent | c. | divergent | b. | horizontal | d. | transform |
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10.
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Which of these did NOT provide evidence for continental drift?
a. | sea-floor spreading | c. | the fossil record | b. | oceanic plate theory | d. | magnetic
reversals |
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11.
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Where does sea-floor spreading take place?
a. | convergent boundaries | c. | oceanic volcanoes | b. | transform boundaries | d. | mid-ocean
ridges |
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12.
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What does the theory of continental drift explain?
a. | the layers of the Earth | c. | how volcanoes
formed | b. | why continents move | d. | how oceans formed |
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13.
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Which of the following is associated with transform boundaries?
a. | slab pull | c. | sea-floor spreading | b. | magnetic reversal | d. | earthquakes |
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14.
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Tectonic plates “float” on
a. | the ocean. | c. | the asthenosphere. | b. | the mantle. | d. | the
lithosphere. |
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15.
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Magnetic reversals are preserved in
a. | compass needles. | c. | all minerals. | b. | magnetic minerals. | d. | seismic waves. |
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16.
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The youngest rocks on the ocean floor are located ____.
a. | near continents | c. | far from mid-ocean ridges | b. | at mid-ocean
ridges | d. | near
Asia |
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17.
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The crust and upper mantle make up Earth's ____.
a. | lithosphere | c. | core | b. | asthenosphere | d. | continents |
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 Figure
10-1
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18.
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According to Figure 10-1, what type of plate boundary occurs between the North
American Plate and the Eurasian Plate?
a. | transform boundary | b. | divergent boundary | c. | convergent
oceanic-continental plate boundary | d. | convergent oceanic-oceanic plate
boundary |
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19.
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According to Figure 10-1, what type of plate boundary occurs between the Nazca
Plate and the South American Plate?
a. | convergent oceanic-continental plate boundary | b. | convergent
oceanic-oceanic plate boundary | c. | convergent continental-continental plate
boundary | d. | transform boundary |
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Short Answer
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20.
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Describe the role of the asthenosphere in the movement of tectonic
plates.
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21.
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How do fossils help prove that the continents move?
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Matching
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Match each term with the correct statement below. a. | seafloor | c. | continents | b. | Pangaea | d. | lithosphere |
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22.
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Alfred Wegener believed that the ______ were once joined.
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23.
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The name ______ comes from two words that mean "all land."
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24.
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The Glomar Challenger gathered information about rocks on the
_____.
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25.
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The crust and upper mantle make up the _____.
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Match each term with the correct statement below. a. | mid-ocean ridge | d. | subduction zone | b. | convergent boundary | e. | continental drift | c. | asthenosphere |
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26.
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Earth's thick, plasticlike layer is the _____.
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27.
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Plates move together at a(n) _____.
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28.
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One plate is forced under another in a(n) _____.
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29.
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A(n) _____ is an underwater mountain chain.
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30.
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The main points of evidence for _____ are fossils, rocks, and climate.
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