Here is an electronic version of the practice in identifying chemical and physical changes we did in class today: http://www.quia.com/quiz/303980.html. Students should recognize that a chemical change creates a new substance and usually can not be undone. Physical changes can often be undone and the material stays the same.
Then, we took a look at how the properties of matter are used in technological design. Students should should be able to describe how certain properties of matter can effect choices for suitable materials for designing everyday technology.
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