Earth Science: Geology, the Environment, and the Universe

Section 3: Theory of Plate Tectonics

Theory of Plate Tectonics

1
The map shows where the continents are likely to move in the next 50 million years. The shaded area represents their present position. According to the data on this map, what kind of boundary is found between the Americas and Africa?
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A)subduction
B)divergent
C)transform
D)convergent
2
Where do tectonic plates interact?
A)at mid-ocean ridges
B)in deep-sea trenches
C)at plate centers
D)at plate boundaries
3
Places where two tectonic plates are moving away from each other are called __________.
A)convergent boundaries
B)divergent boundaries
C)earthquake boundaries
D)transform boundaries
4
A place where two plates slide laterally past each other is called a __________.
A)convergent boundary
B)mid-ocean ridge
C)transform boundary
D)divergent boundary
5
Identify the subduction zone in the figure.
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A)A
B)C
C)B
D)D
6
The __________ states that Earth's crust and ridged upper mantle are broken into plates that move at different rates and in different directions.
A)theory of plate tectonics
B)hypothesis of continental movement
C)theory of seafloor spreading
D)hypothesis of continental drift
7
What is the process called when one plate is forced beneath another at a convergent plate boundary?
A)transformation
B)subduction
C)convergence
D)subtraction
8
According to the figure, where is an earthquake's focus most likely to occur?
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A)near the south pole
B)in the middle of the Pacific Ocean
C)in northern Eurasia
D)along the west coast of North America
9
When a divergent plate boundary forms on continents, a __________ forms.
A)crater
B)volcano
C)mid-continent ridge
D)rift valley
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