Shafer,+Olivia

=Murderous Molecules= I really like this article. I thought it was nice how the author described some of the chemicals from the book, as well as telling some of the stories that the book talks about. I really enjoyed learning about some of the most famous murders that were done using poisons. I would definitely encourage other people who are interested in learning about poisons or famous murders to read this article. It did a good job of getting me more interested in poisons and making me want to read the book.

Olivia, Looks good! It does sound like an intriguing book! 5 stars. MW

=**Redefining The Kilogram 2-8-2011**= I find it interesting that the prototype has loss mass after time compared with its copies. Shouldn't they all be losing mass over time instead of just one of the prototypes? I also found it interesting that there are two different way that could be used to derive a new standard. One way is to use Planck's constant, and the other would be to use Avogadro's constant. I think that the Avogadro's constant way would be better because it would affect the least amount of things, like chemistry books. It would also make understanding the mole and Avogadro's number easier for students. Another thing I found interesting was that the kilogram is the last one of the SI base units that is still being defined by a physical artifact rather than an unvarying physical property of nature.

Olivia, Good post! You derived a lot of good information from this article! 5 stars. MW

=Motion Detectors 2-25-2011= I found it interesting that there are three methods used by motion detectors, I never knew that. I also found it interesting that physicists thought that light was made up waves, rather than particles or photons. Another thing I found interesting is that the intensity only impacted how many photons, not how much energy each one possesses. I liked this article because it actually related to me, I have a motion sensor light at my house on my front porch and I found it interesting to learn how it works. I also liked how it gave seven situations where you would have to pick which method was being used, this helped me better understand the different ways each method could be used.

Livvy, Good job! I like how you related this to your own life! 5 stars. MW