August 23

Bell Ringer:
Explain why a molecule of water you drank this morning might have been swallowed by a dinosaur.

Here is the PowerPoint presentation from today. We will be using these slides for the next few days.
http://www.scribd.com/doc/260038/Chem-Com-Unit-1B-A-Look-at-Water-and-its-Contaminants

Homework:
Page 50 #1, 2, 5, 7, 11, 12. For question #12, you must also count the number of each kind of atom.