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Judging Your Model
The diagrams you constructed at the beginning of this unit can be considered models of how ice changes to water. One way to judge how useful a model is would be to determine how well it helps you imagine or understand something you can not see or did not understand. The following is a set of questions that you will use to judge your models of how ice changes to liquid water and how dry ice changes to a gas.1. Are the most important features relating the behavior of the molecules to the changes in state of each substance shown in your models? Use the rating system below to judge whether or not the model provides a good explanation of what is happening.
1 2 3 4 5 Poor explanation Moderate explanation Accurate explanation 2. Would this model be useful to teach someone who had never studied this topic before?
1 2 3 4 5 Definitely yes Probably I think so I don't think so Definitely not! 3. What important features are NOT included in your models?
4. What do you think should be added to this model in order to make it better for someone who had never studied this topic before?
5. Revise your models based on your critique as well as what you have learned about the different states of matter. Draw a series of new pictures based on your critique of the model and anything you learned in this unit.
6. Finish the following sentences:
I changed my original model because it did not explain or include:
My model now includes: