True/False questions about Pollution

The following statements are True or False – Discuss.
  • Sediments are a source of mercury.
  • Wetlands are sinks for both sulphur and mercury.
  • Natural activities (volcanoes, bushfires) can be sources of pollutants.
  • Sinks can become more alkaline due to nitrates and SO2 entering the environment.
  • Diffuse sources can be pin-pointed on a map.
  • A chimney or pipe is a point source of emissions.
  • Mobile pollutants are only released from vehicles on roads and freeways.
  • Fugitive emissions are always gaseous.
  • Mobile emissions are more easily controlled than fugitive emissions.
  • Air (wind) and water currents are the only ways that pollutants can move.
  • Light, gaseous pollutants are more mobile than heavy metal pollutants.
  • Sulfur dioxide is more persistent than mercury.
  • Mercury is more likely to bioaccumulate.
  • Sulfur dioxide is water-soluble to form H2SO4.
  • Only SO2 is released from combustion of fossil fuels.
  • Both pollutants can act synergistically.
  • Methyl-mercury is both water and fat soluble.
  • SO2 disperses easily.
Question: “Identify the source of mercury from the lamp globes at landfill sites as either point or diffuse and give a reason for your identification.” (2 marks)
Examiner’s report: “Students were able to identify the lamp globes as being either a point source (if they identified a landfill site as a single, identifiable, localised source of mercury pollution) or a diffuse source (if they explained that more than one landfill site spread the source of pollution, or if they discussed many individual lamp globes spread throughout a large landfill site). Many students also wanted to include a ‘mobile’ source in their answer; however, this was not required, and was not relevant to the question.”

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