Dickman,+Amanda

Most of the colors used in tattooing pigments contain elements we see in chemistry. The black dies are usually made from iron oxides and carbon, while the white pigments are usually made from titanium, zinc, or lead carbonate. Blue dyes usually contain copper salts. More modern inks are making there way in to the art of tattooing; these synthetic pigments can be removed. The company Freedom-2 uses a ‘colorant and a biological laser target material’ that allows the wearer to change their mind and get the tattoo removed with one treatment of laser treatment.

Amanda, Looks good. 5 Stars. MW

Crude Oil: Distillation can be used to separate the many different hydrocarbons in crude oil. The carbons boil at 40 degrees Celsius and the hot vapor rises in the flask and condenses onto the glass and drips back into the mixture, this separating is called fractional distillation. Different hydrocarbons boil at different times. The crude oil uses this same process but in a bigger variation.

Amanda, Good thoughts but only 63 words. 4 stars. MW

"Redefining the Kilogram" I found it interesting that there are prototypes of weights that are kept away and used as the world standard. The kilogram is the only weight that does not use a property of nature. Because of this over the years it has lost a very small amount of weight. The new standard of the kilogram can be done by rounding the current measure to a number that is divisible by 12, making the new kilogram equal to the mass of 5.0184515x10 25 12 Catoms.

Amanda, OK. 5 stars. MW

“Where Do Elements Come From” I found it interesting that all the elements found on our earth were made from stars in general. When stars are young they are formed of mostly hydrogen, but hydrogen leads to all known elements. Through successive fusion reactions, the nucleus of most elements lighter than iron can be formed. Elements that are heavier than iron can be formed through the “s” process, which is when an iron nucleus captures neutrons, creating a new nucleus. Amanda, 5 stars. MW

MOLE DAYYYYY:) On the Mole Day website I found it interesting that Mole Day was created to peek interest of students in chemistry throughout schools in the United States. The mole, also known as Avogadro’s Number, is a basic measuring unit in chemistry. Although Avagadro received no recognition for his initial hypothesis, fifty years later after his death, Cannizzaro found that Avagadro’s number could solve many problems in chemistry.

Amanda, OK. 5 stars. MW

Dust Explosions In the article “Dust Explosions” it talks about a massive explosion at a sugar plant in Georgia caused by dust particles. The smaller the particle, the less energy is needed to set the particle on fire, causing it to burn faster. A professor of Chemical Safety Daniel A. Crowe says that even static electricity can set off a spark. The dust is sent into the air, mixed with oxygen and ignited by the first explosion. I never thought of dust as a lethal cause of an explosion. It seems like it occurs more than we think it would, considering the 718 injuries in 25 years.

Amanda, Good thoughts. A little late. 4 stars. MW

In the article I knew that helium rises because it is less dense than the air around it, but I didnt know about the buoyant force that forces it to accelerate upwards. I also didnt know that your weight displaces70 liters of air, so you actually weight more than you think you do according to the buoyant force. I knew that the gas sulfur hexaflouride makes you talk deeper like helium makes you talk higher pitched. I also knew that you could pass out from beathing it in too often in a short amount of time, but I didn't know it was because if you don't take breaths in between puffs of helium, your body isn't getting oxygen and your body is suffocating while you aren't even aware of it.

Amanda, Looks good. 5 stars. MW