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What do Concentrations Mean?

Certain gases, such as the greenhouse gases (for example, carbon dioxide, water vapor, methane, and ozone), occur in the atmosphere in miniscule amounts. In this activity, students will use a dilution experiment to understand the concept of part-per-million (ppm) and part-per-billion (ppb) measurements. Through discussion, they will be able to relate these dilutions to concentrations of gases in our atmosphere.
Using this lesson in your classroom
  • Students will understand the concept of part-per-million (ppm) and part-per-billion (ppb) measurements.
  • Students will appreciate the small scale of ppm and ppb measurements, as compared to the concentration scales that they may be familiar with.
  • Students will relate the concepts of ppm and ppb to the concentration of gases in our atmosphere.
  • From The National Center for Atmospheric Research and the UCAR Office of Programs http://www.ucar.edu/learn/1_4_2_14t.htm
D INQ 6, D INQ 10
Teacher Materials
What Do Concentrations Mean? Lesson [0.0 KB]
What Do Concentrations Mean? Student Lab [0.0 KB]