Rosario,+Marina

Mentos and Coke

I never relized that something so simple could effect the way a coke would fizz and release CO2. I did not think to look at the mentos that closly to see how rigged they were. I always thought they were smooth as ice and that the reason why the coke would fizz was because of the solution or chemicals the Mentos are made of. It never accured to me that little nucleation sites could effect something in a big way.

Marina, Good job! You picked out the major points! 5 stars! MW

Redefining The Kilogram

THis article relates to the class because this is something we have learned about in class. We learned about the metal kilogram and how it is the "master" of all kilograms. I thought it was interesting that they base all of the kilograms off of this. I also thought it was interesting that it lost 50µg. This relates to this class because we just learned about "µg" in class.

Marina, Short but sweet. OK. 5 stars. MW

Motion Detectors One thing that i found interesting was that there are three different ways a motion detector can work. They may use a light source, sound pulses, or heat. I thought it was very interesting that some motion detectors use wave sounds, and when this wave sound is broken then it can tell when something is there. Also, the light relates to the class because when the light is shined at a surface, like a dog or a car, it detects that there is something there. When something interferes with the light it causes the electron to bounce and be ejected. I also thought that is was interesting that some motion detectors can tell by the warmth of a body or object. When this object is worm or hot it gives off infrared light. The motion detector reads this ust like a snake would.

Marina, Looks good! You definitely nailed it! Watch the spelling though! 5 stars. MW