What are some examples?
http://chemwiki.ucdavis.edu/Analytical_Chemistry/Qualitative_Analysis/Chemical_Change_vs._Physical_Change
Take the quiz
http://www.quia.com/quiz/303980.html
What are independent and dependent variables?
Let's Watch to find out!
https://www.youtube.com/watch?v=x2606GQmDqY
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