Water Quality Assessment using Algae
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Questions and Answers

What is the primary reason why algae are suitable for water quality assessment?

  • They have a long life cycle.
  • They are sensitive to changes in water quality. (correct)
  • They have a complex reproductive system.
  • They are found in all types of aquatic ecosystems.
  • What happens to the dissolved oxygen in the water when excessive growth of algae occurs?

  • It increases significantly.
  • It is depleted. (correct)
  • It decreases slightly.
  • It remains unchanged.
  • Which of the following ions can cause excessive growth of algae and other aquatic plants?

  • Calcium ions.
  • Potassium ions.
  • Sodium ions.
  • Phosphate, nitrate, and ammonium ions. (correct)
  • What is the ultimate consequence of excess algae growth on aquatic life?

    <p>Death of fish.</p> Signup and view all the answers

    What is the indication of polluted water according to the text?

    <p>Excess growth of algae.</p> Signup and view all the answers

    What factor influences odors, chemical reactions, solubility, palatability, and viscosity in water?

    <p>Water temperature</p> Signup and view all the answers

    Which processes rely on the water's temperature?

    <p>Biological oxygen demand, sedimentation, and chlorination</p> Signup and view all the answers

    What is the ideal temperature range for water?

    <p>50-60 degrees Fahrenheit (10-15.5°C)</p> Signup and view all the answers

    How does temperature affect the palatability of water?

    <p>It affects the taste and smell</p> Signup and view all the answers

    What property of water is affected by temperature, influencing its flow?

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

    Study Notes

    Algae in Water Quality Assessment

    • Algae have rapid reproduction rates and short life cycles, making them valuable indicators of short-term impacts on water quality.
    • Excess growth of algae in water indicates polluted water.
    • Water soluble compounds containing nitrate, phosphate, and ammonium ions can cause excessive growth of algae and other aquatic plants.
    • Excessive growth of algae and aquatic plants can lead to their death and decay.
    • The decay of algae and aquatic plants depletes dissolved oxygen in water.
    • Depletion of dissolved oxygen in water can kill fish.

    Water Quality and Temperature

    • Water temperature influences various aspects of water quality, including odors, chemical reactions, solubility, palatability, and viscosity.
    • Biological oxygen demand is dependent on water temperature.
    • Sedimentation is affected by water temperature.
    • Chlorination is influenced by water temperature.
    • The ideal water temperature range is between 50-60°F (10-15.5°C).

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    Description

    Algae are ideal indicators of water quality due to their rapid reproduction and short life cycles. Excess algae growth can indicate polluted water, causing harm to aquatic life.

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