The purpose of this activity is to introduce students to the concepts of equilibrium and conservation of mass through a model of a closed cyclic system, a pan water cycle.

TEACHER RESOURCES Teacher Materials Student Activity Student Answer Sheets Learning    Goals/Standards COMPUTER MODELS STELLA Versions isee Player software Right-click to download the models PC Format Mac Format Vensim Version Vensim PLE Software Right-click to download the model Pan Water Cycle Excel Version Right-click to download the model Pan Water Cycle NetLogo Version Right-click to download the model Pan Water Cycle

THE MODEL in STELLA THE MODEL in NETLOGO

THE OUTPUT in STELLA

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