Fresh Water and Oceans Quiz
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Questions and Answers

What percentage of the Earth's surface is covered by oceans?

  • 75%
  • 65%
  • 80%
  • 71% (correct)

    • Which of the following is a characteristic of fresh water?

  • Low salinity (correct)
  • Abundant marine life
  • Deep ocean trenches
  • High salinity

    • What is the primary source of fresh water on Earth?

  • Glaciers and ice caps (correct)
  • Lakes and rivers
  • Underground aquifers
  • Atmospheric water vapor

    • Which of the following is a major component of the water cycle?

    <p>Evaporation</p> Signup and view all the answers

    What is the average salinity of ocean water in parts per thousand (ppt)?

    <p>35 ppt</p> Signup and view all the answers

    Which of the following is a significant threat to freshwater ecosystems?

    <p>Eutrophication</p> Signup and view all the answers

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