Jeff+Green

Roger Hiorn is using copper sulfate to transform an apartment into a crystal wonderland. CuSO4 is copper sulfate and once sprayed onto a material it turns into crystals. This is very neat because a reaction between the two compounds can be used in artwork. Although many art techniques are used in making art. Plaster although it has no specific compound in the name is a chemical that is liquid then it hardens. The copper sulfate is a great connection to chemistry.

Jeff, I'd like to give this copper sulfate thing a try someday. Good post! 5 stars. MW

Redefining the Kilogram. I am excited to know that we finally are getting a standard for weights. I've always had trouble figuring out what a kilogram would look like. Everything changes because the international standard has lost 50 ug over time compared to its copies. This is shocking because we never realized that we may have to find new standards for each unit of measure. I hope that we can find a standard like Avogrado's constant which is based off of atoms. If we were to ever lose something like this it would be "tragic"(?). I think technology is finally giving us a way to standardize.

Jeffery, A little tongue-in-cheek humour here! Good job overall! 5 stars. MW

Motion Detectors

Unfortunately, unlike many other kids my age, I cannot relate to such a story. I have never really been out late enough to get caught yet... I think that this is amazing because imagine if one could see infrared light. They would have a distinct advantage over all the bank robbers. They would see the motion sensors and slip right by them. This relates to our chemistry class because we were talking about the radiation, alpha, beta, and gamma. I think that sense though are invisible to the naked eye and so is infrared they must have much in common. This is something that I would like to test because we use microwaves to cook food, so I would like to know what kind of radiation is being emitted through the food (or in Mr. Williams case a little bonfire).

Jeffery, OK. Yes we will talk about microwaves but don't try that at home! 5 stars. MW