Grim,+Jared

I preferred the classification of matter graphic because it helped me understand the difference between mixture and pure substance. I didn't like the first graphic because it was confusing and the questions of the left didn't make sense. I also liked the classification of matter graphic because it gave examples at the bottom of the chart which helped me understand what each classification was. Jared Grim

I learned the difference between distillation and filtration. I learned distillation separates heterogeneous mixtures and filtration separates solutions. I thought Mr. Williams speech about distillation was interesting because different things can be separated by heat and it can be used to help people. For example when you can turn saltwater in to fresh water by using distillation. The chromatography lab was also interesting because it showed all the different colors that are mixed to create one color for m&ms and skittles. I didn't know that they used different colors just to make a brown m&m. Distillation and filtration are relevant to chemistry because they involve compounds, mixtures, and solutions. Jared Grim

Mole Day- I find it interesting that the mole is considered a basic unit of chemistry when the number is so enormous that you can't even count it. I learned that in any molecule or element one mole is equal to the atomic mass in grams of the molecule or element. I learned that Amadeo Avogadro discovered the mole and received credit for it posthumously. I also found it interesting that mole day was created was to get people more interested in Chemistry. I think that was a good idea since Chemistry can be rather dry (no offense Mr. W). This website helped me understand how important the mole is to chemistry.

Jared, No offense taken! Chem's not for everyone.

Dust Explosions and Stoic
I was very shocked when I read how combustable dust can be. The smaller the dust is the better chance there is of it exploding and since dust particles are very small then it can't be too safe. I also read that half an inch of dust can be found in some factories which leads me to wonder what the factories can do to prevent the dust from accumulating. I live by the Harley plant and almost once every couple of months there is a fire due to dust. This confuses me because Harley has dust collectors to prevent those types of fires from happening so I guess they need to think of a better solution to their dust dilemna. Since oxygen helps the spread of fire I'm not quite sure what the factories could do to prevent dust fires and large explosions. I suppose they would need to find a new way to get rid of the dust because without the dust then obvoiously there wouldn't be a possibility of a dust fire. Sorry it took me so long to do my wiki Mr. W, won't happen again

Jared, Good post! I wasn't aware of the Harley fires! No problem on being late - we've all had those technology issues. MW

Sulfur Hexaflouride
The article compared sulfur hexaflouride to helium and oxygen. When SH is blown into a balloon it grows in size over time because the gas is so heavy that the oxygen on the outside is entering the balloon faster than the SH is leaving. An oxygen filled balloon keeps it shape because the oxygen is entering as fast as the oxygen inside the balloon is leaving it. A helium filled balloon decreases its size over time because the particles inside the balloon is moving rapidly and leaves the balloon quicker than the oxygen is entering it.

Jared, Kind of one dimensional but OK. MW

Motion Detectors
After reading the article I was a little confused on the infrared radiation motion detector. I have a hard time believing that it can detect a human's body radiation from a long distance, I thought you would have to be really close to the detector for it to go off. I actually didn't know that human bodies gave off infrared radiation. I was also confused about Hertz's theory that if a fast moving, low frequency wave has the same energy as a slow moving, high frequency wave that they will give off electrons.

Amazing stuff isn't it? MW