Multiple Choice
Identify the letter of the choice that best completes the
statement or answers the question.
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1.
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The plate margin area with the smallest magnitude
earthquakes is the
a. | Peru-Chile trench. | c. | Mid Atlantic ridge. | b. | Himalayan convergence zone. | d. | San Andreas
fault. |
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2.
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A depression at the summit of a volcano, caused by
partial emptying of the magma chamber underneath, is a
a. | caldera. | c. | volcanic neck. | b. | vesicle. | d. | crater. |
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3.
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The spot where the rocks break is
called
a. | crust. | c. | volcano. | b. | epicenter. | d. | focus. |
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4.
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After the various types of explosive eruptions,
statistics suggest that the next greatest hazard for people living near active volcanoes is
generally
a. | toxic volcanic gases. | c. | tephra-rich mudflows. | b. | ash falls. | d. | lava flows. |
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5.
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Choose the incorrect
statement:
a. | Earthquakes may happen along
faults. | c. | Earthquakes happen because of crust
movements. | b. | There is no energy
transmission during earthquakes. | d. | Some earthquakes
happen along the edges of the plates. |
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