Environmental Science Introduction: Air Quality
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Questions and Answers

What are the two main gases that make up 99% of the air we breathe?

  • Oxygen and Water Vapour
  • Nitrogen and Oxygen (correct)
  • Nitrogen and Carbon Dioxide
  • Oxygen and Argon
  • Which gas is essential for the survival of humans and other animals on Earth?

  • Carbon Dioxide
  • Argon
  • Nitrogen
  • Oxygen (correct)
  • What process converts nitrogen into nitrates for plant use?

  • Photosynthesis
  • Respiration
  • Decomposition
  • Nitrogen fixation (correct)
  • Which gas is not part of the naturally occurring gases in the remaining 1% of air?

    <p>Sulfur Dioxide</p> Signup and view all the answers

    Why should you not be able to smell clean air according to the text?

    <p>Clean air is odorless</p> Signup and view all the answers

    What makes pollutants in the air visible according to the text?

    <p>They make the air visible</p> Signup and view all the answers

    What is the name of the air quality index used in Canada?

    <p>Air Quality Health Index (AQHI)</p> Signup and view all the answers

    How is air quality measured in terms of pollutants?

    <p>By the concentration of certain pollutants in the air</p> Signup and view all the answers

    What does a higher number on the AQHI indicate?

    <p>Worse air quality</p> Signup and view all the answers

    Which country uses the Pollutant Standards Index (PSI) to report air quality?

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

    When is it advisable for vulnerable individuals to consult the AQHI daily?

    <p>Between May and October</p> Signup and view all the answers

    What type of individuals should refrain from strenuous outdoor activities when the AQHI is high?

    <p>People with respiratory ailments</p> Signup and view all the answers

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