Mass Balance Model

In this JAVA-based interactive modeling activity, students are introduced to the concept of mass balance, flow rates, and equilibrium using a simple water bucket model. Students can vary flow rate into the bucket, initial water level in the bucket, and residence time of water in the bucket. After running the model, the bucket's water level as a function of time is presented graphically and in tabular form.

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Robert MacKay
Science Education Resource Center, Starting Point Collection

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Teaching Tips

Teaching Tips

This activity should be paired with a follow-on activity in the CLEAN collection by the same author, 'Using a mass balance model to understand carbon dioxide and its connection to global warming'- (http://cleanet.org/resources/41868.html) If not paired, it is out of scope of the collection.

Student activity guides are online and also in pdf/Word form; teacher version has answer keys.

See also: [link http://serc.carleton.edu/introgeo/teachingwdata/examples/CFCsModel.html 'Using Mass Balance to Understand Atmospheric CFCs'] activity referred to in Resources section of the activity.

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