Practice Quiz

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

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66.
The colorful displays in the atmosphere known as the aurora borealis result from which of the following?
  1. The nuclear disintegration of radioactive isotopes in the thermosphere during solar storms.
  2. The combustion of dust particles in the stratosphere during the peak of the sunspot cycle.
  3. The chemical reaction of molecules in the troposphere from ionizing solar radiation.
  4. The excitation of gases caused by the interaction of the solar wind and the magnetosphere.
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67.
Which of the following is a critical part of the increase in primary productivity that occurs during the summer months in the Arctic Ocean?
  1. Increased sunlight supports sustained growth of phytoplankton.
  2. Seasonal influx of nutrients from snowmelt stimulates the rapid growth of algae.
  3. Mixing of deep water with surface water brings essential nutrients up to the photic zone.
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68.
Which of the following organisms is most responsible for fixing atmospheric carbon dioxide to create organic molecules?
  1. Coral polyps
  2. Bacteria
  3. Phytoplankton
  4. Protozoa
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69.
Which of the following geologic structures is characteristic of a passive continental margin?
  1. A thick sedimentary platform.
  2. An inundated forearc basin.
  3. A complex accretionary wedge.
  4. An active fault zone.
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70.
The Atlantic Ocean began to form as a result of which of the following geologic events?
  1. The erosion of a plate margin from repeated continental glaciations.
  2. The subduction of one continental plate beneath another.
  3. The development of a large syncline east of the Appalachian Mountains.
  4. The growth of a rift valley along a major fracture zone in the crust.
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