Stephens,+Abbigail

I read the article about tattoo ink. Many tattoo parlors use permanent ink to make the wearable art last. The color pigments are suspended in a liquid carrier, usually a solution of water, alcohol, witch hazel, and/or surfactants. The pigments vary in composition, some being minerals, others being industrial organics or even plastic-based pigments. A new removable ink produced by Freendom-2 provides a lasting, but also temporary option for tattoos. The ink can be removed in just one laser treatment, compared to permanent ink, which can take months of intense laser treatments. This type of ink is great for the person who loves to change their mind.
 * Tattoo Ink**

Abbi, I guess a lot of people like to be able to change their mind.
 * ) 5 stars. MW

As a mixture, crude oil is useless. It needs to be distilled to become functional. The distillation process separates crude oil into other substances such as gasoline, kerosene, and diesel. First, the oil is heated and vapors rise into a fractional distillation column. As it rises, the vapor cools and condenses to form a liquid. This process is repeated until all of the substances are separated. After the oil is separated, it can be used to produce many different things. Some products include plastic, motor fuel, jet fuel, grease, tar and waxes. I thought that it was very interesting as to how carefully crude oil has to be separated so it can be used. It is weird to think that my clothing came from oil at one point. This article relates to Chemistry in that the crude oil is being changed from a liquid to a gas and being condensed into a liquid once again.
 * Distillation of Crude Oil**

Abbi, Looks good. 5 stars. MW

Every one of the seven base units in the International System of Units has a standard. The kilogram, for example, is kept under high security near Paris. It is kept in a vault along with six other copies. The kilogram sets a standard for weight, which helps scientific research and experimentation for the world to better understand measurement. This standard also helps scientists better understand the value of mole.%Proxy-Connection: keep-alive Cache-Control: max-age=0 TProxy-Connection: keep-alive Cache-Control: max-age=0 value of the kilogram is most important to meteorologists, who need this standard to make accurate forecasts.
 * Redefining The Kilogram**

Abbi, OK. More on the mole later in our course! 5 stars. MW

In 1054, a star blew up and created a supernova. The explosion was very bright and released about twenty six elements into space. During the explosion, more elements were created and formed planets like Earth. Its weird to think that everything was created from an explosion. This article also talked about what stars are made of and how the atoms and ions attach to each other. I thought this article was interesting and very informative becasue i didnt know much about stars before reading it.
 * Where Do Chemical Elements Come From?**

Abbi, OK. Better. Late though. 4 stars. MW

Amadeo Avogadro was an Italian scientist who created a hypothesis called Avogadro's Law. This law states that at a fixed temperature and pressure, equal volumes of gases contain the same number of molecules. His hypothesis was not recognized for many reasons, but mostly because he was considered a careless experimenter, not a brilliant one. Fifty years after he died, Avagadro's hypothesis was finally given credit, and the science world realized that this could solve many problems in chemistry. The number 6.02214199 x 10 23 was later named Avagadro's number. Abbi, Good scientifically oriented post. 5 stars. MW
 * Mole Day**

There are many types of motion detectors that are categorized by what they detect: movement of light, reflection of sound, and infrared radiation. Photo sensors rely on light's ability to initiate an electric current. The "photoelectric effect" is stated as when the light of sufficient energy is shined on a surface, it can cause electrons to be ejected. Sensors can be made for any type of light because al objects have different thresholds. Heinrich Hertz first observed this effect in 1887. He observed that a high-intensity, low-frequency beam of light, causes no electrons from a surface, but a low-intensity, high-frequency beam makes electrons go crazy. The energy of photons depends on their frequency. This theory is compared to bouncing a million ping-pong balls on a window (no damage at all) to one steel ball (shattered window).
 * Motion Detectors

Abbi, OK. What did you know? What did you learn? 4 stars. MW**