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Twelfth Grade (Grade 12) Tectonics Questions

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Grade 12 Tectonics
Surface waves transport energy
  1. by compression and expansion.
  2. by shearing.
  3. in a motion similar to ocean waves.
  4. in a random motion.
Grade 12 Tectonics
Plate                 are where most earthquakes occur.
  1. mantle
  2. interiors
  3. centers
  4. boundaries
Grade 12 Tectonics
Primary waves travel
  1. faster than surface waves.
  2. slower than secondary waves.
  3. at the same rate as surface waves.
  4. slower than surface waves.
Grade 12 Tectonics
Why do many scientists use moment magnitude instead of the Richter scale to measure earthquake energy?
  1. The Richter scale can be inaccurate for earthquakes that shake a long time.
  2. The Richter scale is affected by the quality of building construction.
  3. The Richter scale had a limited range of values and can't measure the strongest earthquakes.
  4. All of the above
Grade 12 Tectonics
As P waves move through the rock, they cause
  1. sideways motions in the rock.
  2. compressions and extensions.
  3. water wave type motions.
  4. shear motions.
Grade 12 Tectonics
Which are true for elastic deformation?
  1. stores energy
  2. causes only temporary changes in the rock
  3. occurs at low stresses
  4. all of these answers
Grade 12 Tectonics
The Richter scale
  1. is not as accurate as the Mercalli scale.
  2. is based on vibrations of the air.
  3. measures of the strength of a seismic wave.
  4. measures heat.
Grade 12 Tectonics
The strongest earthquakes can release hundreds of times the energy of the Hiroshima bomb.
  1. This statement is correct.
  2. This statement is incorrect.
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