Practice Quiz

Praxis II General Science: Content Knowledge Exam Prep - Question List

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71.
Scientists believe that submarine canyons that formed well below sea level and cut to the bottom of the continental rise most likely were produced when:
  1. Fine-grained marine sediments of the continental shelf were fractured by the weight of the overlying water.
  2. Geologic faults lying perpendicular to the continental shelf ruptured, offsetting overlying sediments.
  3. Turbidity currents scoured channels in the unconsolidated sediments of the continental shelf.
  4. Dense freshwater from coastal rivers flowed down over the continental shelf, eroding soft marine muds.
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72.
Submerged flat-topped seamounts called guyots are found in a variety of locations in the world's oceans. These guyots are typically formed through which of the following processes?
  1. The growth of coral reefs.
  2. The accumulation of marine diatoms.
  3. The erosion of volcanic islands.
  4. The uplift of tectonic plate fragments.
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73.
Which of the following sedimentary rocks would most likely have formed from sediments accumulating in a deep-ocean trench?
  1. Shale
  2. Sandstone
  3. Breccia
  4. Limestone
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74.
The narrow longshore currents that transport sand grains along the immediate coastline are primarily produced by:
  1. Tidal forces that fluctuate throughout the day.
  2. Local winds that blow parallel to the beach.
  3. Waves that strike the beach at an angle.
  4. Beach runoff that carries water back into the surf.
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75.
Over the past 50 years, the Mississippi Delta has diminished in size as the Gulf of Mexico has flooded many areas that were previously above sea level. This has been primarily the result of which of the following processes?
  1. Overuse of groundwater resources and the consequent sinking of the land surface of the delta.
  2. Down warping of the North American plate and the resulting drop in the overlying delta deposits.
  3. Increased frequency of major tropical storms and the related increase in erosion of the delta.
  4. Reduced replenishment of sediment and ongoing compaction of delta deposits.
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