Hilary Kennedy Practice questions

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1. Which of the following statements is TRUE?

  • Variations in salinity affect the overall constancy of composition of seawater with respect to major constituents
  • Oxygen concentrations are lower in the north Pacific compared to the north Atlantic.
  • The deep oceans are poorly supplied with oxygen by deep water masses formed in polar regions
  • Elements classified as recycled have concentration profiles resembling those of scavenged elements.
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Other questions in this quiz

2. Which process can be described as "The cellular process by which molecules are oxidized, releasing energy and liberating carbon dioxide as a waste product".

  • Dissolution
  • Photosynthesis
  • Respiration
  • Recycling

3. If the regression equation, that represents how much absorption increases with increasing concentration (M) is calculated to be y=0.4x-0.01. What is the concentration of a solution with an absorbance of 0.79?

  • 1.845 microM
  • 195 microM
  • 2 microM
  • 0.306 microM

4. In what situation does the rate of production of marine aggregates generally exceed the rate of disaggregation and/or consumption, leading to the occurrence of aggregates at the sea bed?

  • During seasonal blooms of phytoplankton
  • During winter periods with low biological activity.
  • During period of high pressure
  • During periods of high winds delivering dust to the ocean

5. Why is iron fertilisation a topic of great current interest?

  • Because it stimulates biological activity in regions with low phytoplankton growth but high nutrients, leading to a high export flux of carbon to the sea floor.
  • Because it stimulates biological activity in regions with low phytoplankton growth but high nutrients, leading to patches of the ocean that have high magnetism
  • Because it stimulates biological activity in regions with low phytoplankton growth but high nutrients, leading to a cooling of the surface ocean waters.
  • Because it stimulates biological activity, which are heavier than normal and so sink rapidly.

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