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      Earthquake Practice Quiz 1 on QuizRevolution

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      Newest Quiz: Earth Structure 1

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      Earthquake Practice Quiz 1
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      Earthquake Practice Quiz 1
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      Earthquakes can occur when which of the following is passed?
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      • tension limit

      • seismic limit

      • elastic limit

      • shear limit

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      Comments:
      1. Earthquakes can occur when which of the following is passed?
        1. tension limit
        2. seismic limit
        3. elastic limit
        4. shear limit

        1. When the elastic limit is passed, the bedrock no longer has the flexibility to strecth or be compressed or sheared.  Instead, the bedrock breaks, sending shockwaves that are felt as an earthquake.

      2. When rock on one side of a fault drops below the rock on the other side, it is called a
        1. normal fault
        2. strike-slip fault
        3. reverse fault
        4. shearing fault

        1. Normal faults form when once side of a fault drops below the other side.  They are created by forces of tension (pulling and stretching).  They are often caused by divergent plate boundaries but other plate boundaries can create them.

      3. From which to primary and secondary waves move outwards?
        1. epicenter
        2. focus
        3. Moho layer
        4. tsunami

        1. The epicenter is the location of the break in bedrock that sends out earthquake vibrations.

      4. What kind of earthquake waves stretch and compress rocks?
        1. surface
        2. primary
        3. secondary
        4. shear

        1. Primary waves are compression waves.  They compress and stretch rocks in the direction that the waves are moving.

      5. What are the slowest seismic waves?
        1. surface
        2. primary
        3. secondary
        4. pressure

        1. Surface waves are the slowest.  Primary waves are the fastest.  Primary waves are a type of pressure ways.  Secondary waves are medium speed.

      6. How many seismograph stations does it take to find the location of an epicenter?
        1. two
        2. three
        3. four
        4. five

        1. Since the earth is three-dimensional, it takes three seismographs to locate an earthquake's epicenter.  This is called "triangulation."

      7. What happens to primary waves when they pass from liquids into solids?
        1. slow down
        2. speed up
        3. stay the same
        4. stop

        1. As primary waves move from the liquid outer core into the solid inner core, they speed up.  Solids are more dense than liquids and transfer vibrations more rapidly.

      8. What part of a seismograph does not move during an earthquake?
        1. sheet of paper
        2. fixed frame
        3. drum
        4. pendulum

        1. The pendulum stays still while the fixed frame, the paper and the drum all vibrate with seismic waves.  The pen is attached to the pendulum and records the vibration of everything else.

      9. How much more energy does a 7.5 magnitude earthquake release than a 6.5 earthquake?
        1. 32 times more
        2. 32 times less
        3. twice as much
        4. about half as much

        1. Each magnitude increase of "1" means an increase of energy release by 32 times.

      10. What are the recorded lines from an earthquake called?
        1. seismograph
        2. Mercalli scale
        3. seismogram
        4. Richter scale

        1. A seismograph is the measuring device which produces a record called a seismogram just like a telegraph produces a message called a telegram.  Mercalli scale and Richter scale are different ways to measure an earthquake.

      11. The Mercalli scale is a Roman Numeral scale that measures
        1. the amount of energy an earthquake releases.
        2. the speed of seismic waves.
        3. the depth of an earthquake.
        4. how much an earthquake is felt and how much damage it causes

        1. The Mercalli Scale is a way to measure how much people feel an earthquake and how much damage it does.  This is related to how much energy it releases, but is not the same thing.

      12. Intraplate earthquakes are different from interplate earthquakes
        1. because they happen in the middle of tectonic plates.
        2. because they happen at convergent boundaries.
        3. because they happen at transform boundaries.
        4. because they happen at divergent boundaries.

        1. Intraplate earthquakes happen in the middle of a plate.  Interplate earthquakes happen at plate boundaries.

      13. Earthquakes in New England are caused by
        1. a transform boundary in Maine.
        2. pressure from formation of crust at the Mid-Atlantic Ridge.
        3. subduction of the Altantic Plate under Cape Cod.
        4. volcanoes that are trying to form a new rift valley.

        1. New crust forming at the Mid-Atlantic Ridge is putting pressure on the North American plate.  The pressure builds up until it exceeds the elastic limit of the weakest parts of the crust here.  The weakest parts of the New England crust are places where the crust was stretched out during the breakup of Pangaea 200 million years ago.

      14. How did a 1960 earthquake in Chile damage Hawaii and Japan?
        1. The earthquake caused other earthquakes around the world.
        2. The earthquake caused volcanoes to erupt in Japan and Hawaii
        3. The earthquake caused plates to move in Japan and Hawaii.
        4. The earthquake caused a tsunami that went across the ocean.

        1. Earthquakes off the coast of Chile are caused by movements of the convergent oceanic-continental boundary.  These types of boundaries often produce tsunamis.  Tsunamis can travel across the ocean and did in 1960.

      Tags: education , science

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