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Supplement Activity Number 2 - A Graphing Exercise (Optional)


To allow students to measure the ground-level ozone in their area, and to examine the trend over a specific length of time.


  • local ground-level ozone readings from the internet or local smog/air quality forecast
  • graph paper


  1. Obtain the local ozone reading for each day.
  2. Have the students graph the ozone readings for the week and go over the discussion points


Discussion Points:

  • What does your graph tell you about the ozone level in your area?
  • During what part of the day is the ozone level highest? Why do you think that is?
  • What contributes to the ozone level in your area?
  • What is being done to decrease harmful ground-level ozone? (Possible answers-smokestacks and cars now have better pollution controls. People are becoming more conscious of conserving energy.)

Have the students record their observations. Keep a log of the dates and measurements for next year's students to compare their measurements with. It would be a good idea to keep a record of temperatures and cloud cover with this for the students to observe the trends together.


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