1-3 Parts Per Million

Parts Per Million

In the hands-on activity, students will develop an understanding of the terms parts per million (ppm) and parts per billion (ppb) by systematically diluting a solution of food coloring and water. They will convert ratios to percentages to ppm to ppb. They will correlate the ratios they’ve created in the classroom to the ratios of various gases in our atmosphere. As another option, the class can do a similar activity using milk and water. In this case, students can demonstrate the Tyndall Effect in which a beam of light is visible in a mixture of water and milk, even when mixture appears clear to the naked eye.


Teacher to Teacher 1-3

Parts Per Million - 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.


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OTHER MODULE 1 (AIR POLLUTANTS & THEIR SOURCES) ACTIVITIES AND VIDEOS

1-1 What Is Air?

1-2 Combustion and Combustion Equations

1-3 Parts Per Million (this activity)

1-4 The Criteria Pollutants and a Closer Look at Ozone

1-5 NC & Local Sources of Air Pollution

1-6 Making and Using Ozone Indicators

1-7 Sampling Particulate Matter