states-of-matter-basics-html-guide_en.pdf - Tips for Teachers States of Matter Basics States Screen Heat or cool atoms and molecules and watch as they

states-of-matter-basics-html-guide_en.pdf - Tips for...

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States Screen Heat or cool atoms and molecules and watch as they change between solid, liquid and gas phases. Phase Changes Screen Explore how the system behaves as the atoms and molecules are heated, cooled, compressed, or more particles are added. Rouinfar, December 2016 CHOOSE an atom or molecule EXPLORE solid, liquid, or gas Tips for Teachers States of Matter: Basics VIEW the temperature in K or ºC ADD or REMOVE heat from the system OBSERVE the motion of the sample VIEW a qualitative phase diagram PUMP in additional atoms or molecules COMPRESS the sample PAUSE and step through the motion
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Complex Controls The number of atoms or molecules that can be pumped into the system is limited. The indicator bars show how much is left to pump into the system. The background color of the simulation can be changed for easier projection by clicking on the PhET menu bar, selecting Options, and checking Projector Mode. Projector Mode can also be accessed by adding ?projectorMode to the end of the sim’s URL. Model Simplifications The model works best when there are at least (roughly) 15 particles in the container. It is possible to create situations where there are only a few particles in the container and, in these situations, students may observe some odd behaviors. One example is occasional visible changes to the velocity of individual particles. If students observe such things, they should be told that this is due
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  • Fall '08
  • Szalewicz,K

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