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How to Test the Ozone Layer in a Science Fair Project

Ozone is a harsh, sharp-smelling layer of the atmosphere necessary for plant growth and protection from ultraviolet rays. However, too much ozone in the air causes lung problems, like asthma, for humans. To keep the balance between too much and too little ozone, humans need to avoid polluting the air with harsh chemicals. Demonstrate these principles to your students by testing the ozone at ground level around your school or home. Have them recreate the experiment in a science fair project. Compare different areas of the playground or backyard to see how much ozone levels vary.

Things You'll Need

  • Digital thermometers
  • Cardboard strips
  • Ozone test strips
  • Paper tape
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Instructions

    • 1

      Take the temperature in several different places around the school or home. Compare temperatures between shady and sunny places as well as areas covered in asphalt versus areas covered in grass.

    • 2

      Mark one cardboard strip for each test area with the temperature of that test area. This will show you whether more ozone gathers in warm or cool places.

    • 3

      Tape an ozone test strip, available from science supply stores and sites, to each cardboard strip. Place each strip in the corresponding temperature zone.

    • 4

      Wait for an hour. Gather up all of the cardboard strips and compare the colors of the ozone strips. Each ozone strip should be a shade of pink or red. The lighter the color, the less ozone is present in the area.


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