Visco,+Nathan

1/21/10 I read the article about tattoo ink. I liked this article because it gave some back round on tattooing. I disliked reading this article because it said people make their own inks and mix different things together, also another thing I disliked was that they have no one check or make sure the inks for tattooing are safe to use so you never really know what you’re getting.

Nathan, A bit short. Make sure you make some relations to our class. 4 stars. MW

1/22/10 Crude oil Hydrogen and carbon is what makes up crude oil. They separate crude oil by distillation. They use this same process in big oil factories but on a much bigger scale. At different temps you heat the crude oil you get different things. Like 20 C you get Gas. At 150 C you get gasoline. At 200 C you get Kerosene. At 300 C you get diesel oil. At 370 C you get fuel oil, and lastly at 400 C you get lubrication oil, Paraffin wax. This is like what we did in class today with seperating the different colors of dye, But the way we seperated the two were very different one was with heat the other was with water. I found this short video very interesting because i didn't know you could get all these things just from crude oil.

Nathan, OK. Looks good. BTW crude oil is made of hydrocarbons, which are compounds of hydrogen and carbon. MW

1/28/10 Redefining the kilogram This article talked about the scientific community taking the kilogram and instead of having an object as the standard changing it to something in nature that would never change. The reason they want to do this is because the standard lost some mass because it was a little radioactive. A few Nano grams might sound like nothing but to scientist this was a big deal. This relates to our class because we work with kilograms (which measure mass) and other units of measurements they talked about in the text like meters (length), seconds (time), kelvin (temperature). This article was really cool and i liked it, but the article got a little confusing when they started to talk about how they used numbers and stuff that would give them the same thing as a soild object that wieghs a kilogram. In my opion they%2Proxy-Connection: keep-alive Cache-Control: max-age=0 hould keep the standard object kilogram less confusing.

Nathan, We will learn about some of these confusing things in Chem class! MW

3/1/10 Elements In this article it talked about how scientist think all elements came from stars. They say this because atoms are constantly fusing to create heavier atoms inside the star. This process creates alot of energy gives off heat and light. It also talked about how these elements get from the stars to planets. When a star burns off all its fuel it becomes very large then inplodes and creates a super nova sending all those elements everywhere. This article was very cool and i always see shows on the history and discovery channel about these kinds of topics.

Nathan, Looks good. 5 stars. BTW Jack Cardello says Hi - stay off my wiki! :) MW

Mole Day I learned that a mole is 6.02x10^23 a much to big a number to comprehend. I learned many cool facts on the mole. Did you know if you had a mole of paper it would reach to the moon and back 30 billion times. Mole day is a great fun day to celebrate it was started may 1991 by a chem teacher. The abrevation for mole is mol chemist use the mole to count because in chemisty they weigh things to count them. Talking about mole day was a cool way to make connection to the world. This was a great fun thing to read about i also loved some of the mole jokes.

Nathan, OK. Looks good. You might want to use spell check. :) 5 stars!

Dust Explosions 9/4/10 This article was very easy to relate to because we saw how dust can cause explosions in class. The part in the article that i found most interesting was how the first explosion can get dust that has been collecting over the years to mix in the air and cause second and third explosions that are sometimes bigger then the first. I also think it is nessary to look into dust explosions so we can have a safe place for people to work. The article was sad because people died but we can look at this and try and prepare for the future for a safer working place.

Nathan,

Good post. I know that OSHA is looking hard at this sort of tragedy! 5 stars! MW

Sulfur hexaflouride This article was very interesting i learned many things about Sulfur hexaflouride like the molecule is symmetrical. I also knew things about Sulfur hexaflouride like its SF6 and it's a gas at room temp and It has a density of 6.13 g/L. I also knew it was a non-toxic colorless, odorless non-flammable gas. The gas is made of one Sulfur atom and 6 fluorides. The article was very interesting and i learned a lot.

Nathan, A little short and very late. 3 stars.

Motion Detectors This article was cool because motion detectors are a part of every day life like in the bathrooms at school the lights are controlled by a motion detector. Things are learned are that there are different ways or methods motion detectors use like heat. I also learned that motion detectors work the same way bats use ecolocation but with light instead of sound. I can relate this article to our clase because or class room has a motion detector :). Over all cool article and i enjoyed reading it. i did not know high-frequency waves should be able to eject electrons. One last thing i knew was that a red light has a lower frequency then a blue light we learned this in class.

Nathan, OK. Late coming in but pretty well written. 4 stars.