Intro to oceans - Hilary online test compilation C

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1. Which of the following statements is INCORRECT?

  • Gas solubility increases with increasing temperature
  • Oxygen, methane, nitrous oxide and dimethyl sulphide (DMS) are all gases produced by planktonic organisms in surface waters.
  • Gas solubility decreases with increasing salinity.
  • The transfer of gases can take place over the air-sea interface
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2. 38 Which is NOT a likely to be contributory cause of the supersaturation of oxygen observed in surface waters?

  • Respiration
  • Breaking waves
  • Air injection
  • Photosynthesis

3. What is biological aggregation?

  • The formation of large particles from smaller particles by activities such as zooplankton grazing
  • The formation of lots of small particles in a small space due to turbulence
  • The disturbance of organisms by particulate matter
  • The attraction of organisms to a single location in the upper sunlit layers of the ocean

4. Which dissolved constituent will reach its maximum concentration at the deepest depth

  • Phosphate
  • Silicate
  • Nitrate
  • Magnesium

5. Which IS NOT a common mechanism for removal of the dissolved minor and trace elements from seawater?

  • Evaporation
  • Biological activity
  • Scavenging
  • Absorption

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