How can we find out if there is ozone in the air around our school?
Where on campus can we find the most ozone?
TIME NEEDED: 90 minutes
Making the Strips
White filter paper
Glass or plastic stirring rod
Small paint brush
Beaker, 250 ml
Safety goggles (optional)
Low-temperature drying oven (optional)
Heat-safe glass plate (optional)
Microwave oven (optional)
Exposing the strips
Distilled water in a spray bottle
Interpreting the strips
Schoenbein color scale (included)
Relative humidity Schoenbein Number Chart (included)
TOPICS: ground-level ozone
TYPES: data collection, data analysis
ESSENTIAL STANDARDS for Earth/Environmental Science:
EEn.2.5.1. Summarize the structure and composition of our atmosphere
EEn.2.5.5 Explain how human activities affect air quality
Making and Using Ozone Indicators Activity
In the hands-on activity, students check for the presence and relative amounts of ozone in the air using Schoenbein strips they make with filter paper, cornstarch, and potassium iodide.
Making and Using Ozone Indicators - Teacher to Teacher Tips
The quick video below has tips for doing this activity from Mark Townley, an award-winning, North Carolina high school teacher. Mark helped develop It’s Our Air and has used each of these activities with his students.
OTHER MODULE 1 (AIR POLLUTANTS & THEIR SOURCES) ACTIVITIES AND VIDEOS
1-6 Making and Using Ozone Indicators (this activity)