Multiple Choice
Identify the choice
that best completes the statement or answers the question.
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1.
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Wegener believed that the continents originally
broke apart about ____ years ago.
a. | 300 million | c. | 200
million | b. | 400 million |
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2.
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Which type of crust is made mostly of
basalt?
a. | oceanic crust | c. | continental crust | b. | aesthenospheric
crust |
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3.
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What was used to discover that the youngest rocks
were near the mid-ocean ridge?
a. | ropes lowered by hand from the HMS
Beagle | b. | the Glomar Challenger | c. | fishing nets |
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4.
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The ancient continent that contained all the
landmasses is called
a. | Laurasia. | c. | Pangaea. | b. | Gondwana. |
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5.
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Continental crust is made mostly of two kinds of
rock. They are
a. | basalt and igneous | c. | granite and basalt | b. | rocks and
granite | d. | lithospheric and metamorphic |
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6.
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Which of the following makes up most of the
Earth's mass?
a. | mantle | c. | inner
core | b. | crust | d. | outer
core |
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7.
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The thinnest part of a tectonic plate lies
beneath
a. | a coastal plain. | c. | the
middle of the ocean. | b. | the center of a
continent. | d. | a mountain range. |
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8.
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Scientists have used drilling equipment to drill a
hole down into the Earth’s
a. | crust | c. | aesthenosphere | b. | moho | d. | mantle |
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9.
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In the 1940’s and 1950’s, scientists
began using __________ to map the ocean floor.
a. | laser beams | c. | sound waves | b. | radar |
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10.
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What actually causes the continents to
move?
a. | the coriolis effect | c. | seafloor spreading | b. | the Earth’s
rotation |
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11.
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The world’s longest chain of mountains is
the
a. | Andes Mountains | c. | Rocky Mountains | b. | mid-ocean
ridge |
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12.
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The part of the Earth on which the tectonic plates
are able to move is the
a. | lithosphere. | c. | asthenosphere. | b. | subduction
zone. | d. | mesosphere. |
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13.
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The youngest rocks are found
a. | far away from the mid-ocean ridge | c. | on the continents | b. | near the mid-ocean
ridge |
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14.
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This is a boundary between the crust and the
mantle. Seismic waves change speeds as they pass through this area.
a. | the asthenosphere | c. | the
seismic boundry | b. | the
lithosphere | d. | the mohorovicic discontinuity |
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15.
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Which layer of the Earth is made up of tectonic
plates?
a. | mesosphere | c. | lithosphere | b. | asthenosphere | d. | core |
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16.
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Who was the scientist that helped prove that
Wegener was right about Pangaea with his theory of Sea Floor Spreading?
a. | Enyaw Ekrub | c. | Harry
Hess | b. | Nicholas Copernicus | d. | Alfred E
Neuman |
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17.
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The scientific name for the crust is
the
a. | continental crust | c. | lithosphere | b. | aesthenosphere | d. | mantle |
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