Oh... another idea!!!

I was thinking my students could use wallwisher to pick a chemical that is in cigarettes, and then find at least 3 other places where that chemical is used. For example: Acetone is a chemical in cigarettes, it is also used in nail polish remover, nail polish, paint thinners and its used to clean fiberglass. My point to my students would be... why would you ingest a chemical in your body that is used in all these different ways?