Practice Quiz

NAEP Science Grade 12 - Question List

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86.
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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87.
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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88.
Which of the following explains why the sky appears blue?
  1. Air molecules selectively scatter the shorter wavelengths of visible light.
  2. Air molecules reflect the longer wavelengths of visible light.
  3. Water vapor refracts visible light into its component frequencies.
  4. Water vapor selectively absorbs visible light at certain wavelengths.
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89.
Overcast nights tend to be warmer than clear nights even when temperatures on the preceding day have been the same. This is primarily because on overcast nights:
  1. Evaporation rates are substantially reduced.
  2. Clouds radiate infrared energy downward.
  3. Convection currents are unable to develop.
  4. Water vapor condenses, releasing energy.
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90.
As a result of the Coriolis effect, wind currents tend to:
  1. Cool off as they converge and rise
  2. Flow in a straight path as they cross lines of longitude.
  3. Heat up as they diverge and sink.
  4. Curve as they flow over Earth's surface.
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