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EOSC 114 Study Guide - Midterm Guide: Cascadia Subduction Zone, Mercalli Intensity Scale, Earthquake PredictionExam

Earth and Ocean Sciences
Course Code
EOSC 114
Study Guide

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EOSC 114 MIDTERM 1 Last Name, First Name: _____________________________
2010 Fall - Term 1 Student Number: ____________________
Instructions: Closed book. No calculator. Indicate all your answers on the Scantron sheet. Only the Scantron sheet
will be marked, but turn in both the Scantron (answer) sheet and this question packet. Put your name and student
number on both the Scantron sheet and the question packet. There is only one best answer to each question. Don’t
leave any questions unanswered (if you don’t know the answer, then guess). Good luck!
This is “Test Form” (A). Please indicate (A) in the “Test Form” column on your Scantron sheet.
1. If you have data from one earthquake recording station you can determine
A) when the next earthquake will occur. B) the distance from the station to the epicenter. C) two places where the
earthquake might have occurred. D) if a tsunami was triggered. E) the latitude and longitude of the epicenter.
2. About how much more ENERGY does a magnitude 7 earthquake release than a magnitude 5 earthquake?
A) 10 times B) 100 times C) 1000 times D)10,000 times E) 100,000 times
3. The following locations are equidistant from the epicenter of a 6.1 magnitude earthquake. Where will the shaking be
felt most strongly?
A) In a 25 storey concrete building built on alluvial sediments. B) In a brick house built on granite bedrock.
C) In a 3 storey concrete building built on alluvial sediments.
D) In a wooden cabin built on alluvial sediments.
E) In a steel shack built on granite bedrock
4. Which indicator is the most reliable for earthquake prediction? A) Animal behaviour. B) Deformation at the surface.
C) Seismic gaps compared to past records. D) Measurements of seasonal rainfall. E) Occurrence and strength of
earthquake foreshocks.
5. Which statement is FALSE? A) Earthquakes can trigger tsunami due to ground rupture on the ocean floor. B)
Earthquakes can cause buildings to fall over intact due to liquefaction. C) Earthquakes can trigger dangerous
landslides. D) Earthquakes often trigger volcanic activity nearby. E) Collapsing buildings can result in a large
amount of casualties during earthquakes.
6. The Cascadia subduction zone A) moves smoothly due to the subducting young, hot oceanic plate. B) is
accumulating stress and elastic strain. C) continues no further North than Seattle, U.S.A. D) does not constitute an
earthquake risk to Vancouver. E) is likely to produce large magnitude earthquakes but is too far from the coast for
the effects to be felt on land.
7. If you are indoors during an earthquake, the best thing to do is A) Run outside. B) Duck under a sturdy table or
desk. C) Call emergency services. D) Use a car to escape. E) Stand close to a window.
8. Which statement is TRUE? A) Earthquake magnitude and intensity are the same thing. B) Earthquake magnitude
refers to how an earthquake affects people. C) Earthquake intensity is a measure of the size of the earthquake.
D) The Modified Mercalli Scale gives a description of earthquake magnitude. E) An earthquake has a single
magnitude and a range of possible intensities.
9. During an earthquake, a city built on thick lake sediments is likely to experience A) amplified seismic waves.
B) accelerated seismic waves. C) body waves only. D) a reduced risk of liquefaction. E) surface waves only.
10. An earthquake begins A) when rock begins to flow. B) at the epicenter. C) when seismic waves cause a fault to slip.
D) due to ground rupture. E) when a fault slips due to stress overcoming the rocks’ elastic limit.
11. Earth's carrying capacity
A) is a fixed hard limit on the maximum population that can be sustained on Earth.
B) depends mostly on birth and death rates, and NOT on available food, energy, or water.
C) is NOT fixed, because technical advances in food and energy production can always satisfy the needs of a
growing population. D) is NOT fixed, but is also NOT unlimited, because technical advances can NOT always
satisfy the needs of a growing population.
E) is NOT a concern anymore, because population growth has slowed.
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