Evidence of a Chemical Reaction

This week we will investigate what a chemical reaction is and how we know that one has occurred through the evidence of chemical changes. Embed each of the videos (listed as links below) on your blog as one single post titled "Evidence of a Chemical Reaction."

Beneath each video link, write what in complete sentences what you observed in that video. What evidence do you see in that video that indicates that a chemical reaction has occurred? What are the chemical changes that can occur during a chemical reaction? A pondering moment: What causes a reaction to end?
Finally, find a YouTube video on your own that shows a new chemical reaction and embed it into your blog.
Visit other classmates' blogs to watch their videos and comment on them the same way.

***BONUS: What can chemical changes tell us about the elements that are involved in the reaction?

http://www.youtube.com/watch?v=hVK9Om4wzBM
http://www.youtube.com/watch?v=8ypUVpwgcAA&feature=related
http://www.youtube.com/watch?v=896vJj6eWYw&feature=related
http://www.youtube.com/watch?v=qRmNPKVEGeQ&NR=1
http://www.youtube.com/watch?v=vJslbQiYrYY&NR=1
http://www.youtube.com/watch?v=w2mj-Sq2oeo&feature=related
http://www.youtube.com/watch?v=5n7kBkBcXgo&NR=1
http://www.youtube.com/watch?v=_Pk6s1MbszA&feature=related
http://www.youtube.com/watch?v=zrNA8-eipGE&feature=related