Interactive, scaffolded model
This Activity Requires:
Important! If you cannot launch anything from this database, please follow the step-by-step instructions on the software page.
Please Note: Many models are linked to directly from within the database. When an activity employs our scripting language, Pedagogica, as do some of the "guided" activities, the initial download may take several minutes. Subsequent activities will not take a long time. See this page for further instructions.
Students observe a model of a gas and are challenged to prevent spatial equilibrium while the model is running. Students learn how spatial equilibrium is determined.
Students will be able to:
Nature loves equilibrium. All natural systems tend to move in this direction be it energy minimization, pressure, or osmosis. Spatial equilibrium explores the nature of how molecules move from an area of high concentration to lower concentration. Students set up various starting conditions and watch as the system naturally reaches a spatial equilibrium in which the concentration is, on average, over time, the same everywhere.
This activity is linked closely with two other activities:
Brownian Motion: http://molo.concord.org/database/activities/40.html
Diffusion, Osmosis, and Dialysis: http://molo.concord.org/database/activities/223.html
Continual movement of atoms results in motion that appears random and causes particles to be distributed evenly among the atoms in a gas.
Additional Related Concepts
You might find useful the classroom support available at: http://www.concord.org/~barbara/workbench_web/unit1/index.html
Imagine that you are at a party where someone dared you to pop one of the Helium balloons in a room that has all the windows and doors closed. Describe what would happen to those Helium atoms once they have been released from the balloon. Specifically, talk about their eventual position inside the room and how they arrived there.
Does not work on all Macs.
Last Update: 12/07/2015
Maintainer: CC Web Team (firstname.lastname@example.org)
Document Options: Text-only / Accessible Version | Printable Version | E-mail this Page
Copyright © 2019, The Concord Consortium.
All rights reserved.
These materials are based upon work supported
by the National Science Foundation under grant numbers
9980620, ESI-0242701 and EIA-0219345
Any opinions, findings, and conclusions or recommendations expressed in this
material are those of the author(s) and do not necessarily reflect
the views of the National Science Foundation.