Gross,+Micah

I liked the third graphic best. To me, it was easier to follow the classification of matter. The first graphic was okay. The pictures were nice, but I could not follow the classification nearly as well as graphic three and two. Also, the third graphic went into the most detail of the classification, classifying it the whole way down to blood, plasma, hemoglobin, and iron. In short, the third graphic has the most detail and is the easiest to follow.

In Biology last year, we did this same experiment but with a different resource for the dye. Insted of skittles, we used pen ink. I knew what was going to happen during this experiment, but I am unsure if the color of dye will change compared to its original color. When we did the pen in biology, the color of dye changed as it when up through the paper. I look forward to see if the dye color will change from the original color like the M&M. Personally I'm thinking that it will not change like the pen because the pen was ink and this is a food dye. They are two different things, and I look forward to seeing if my prediction is correct.

Measurement is important to me because without it, I would not be able to move things around my house (like tables, couches, and desk). Without measurement, I wouldn't know if it would fit through the door or into the room. Also, if someone played sports, measurement would be important because they would need to know how much they grew and how much weight they gained. Measurement is important in our lives for many things, for science as well as other things. Without measurement, people would be lost. Measurement is an important part of a lot of jobs, such as being a taylor and a construction worker. These two jobs all require measurement, and even the smallest mistake can be very fatale.

Redefining the Kilogram When I read this article, I found it pretty confusing. Nonetheless, I did learn something. I learned that the kilogram is the last of the SI base units still based on a physical object rather than%2Proxy-Connection: keep-alive Cache-Control: max-age=0 roxy-Connection: keep-alive Cache-Control: max-age=0 20"physical property of nature". But it seems that this is going to change. As I read more into the article, it seems that there is going to be a new way to get a kilogram, which seems to be by using%2Proxy-Connection: keep-alive Cache-Control: max-age=0 n equation. I found it intresting that there were two types of equations that were considered being used for this: Planck's constant and Avogardo's constant. Personally, it doesn't matter to me which one they use, but I'm kind of intrested to hear the final choice on what they decide on.

Looks good! MW

Airport security This article taught me how airport security works and how bombs are detected. I found it interesting that the density of the materials in the bag being checked through airport security affects if they check the bag or not. Materials to make a bomb will have a different density the those of a normal bag going through airport security. Using X-Ray technology, intense X-Ray beams irradiate the bag and measuring the extent of beam attenuation, they can find out the density of the items in the bag. If the bag has abnormal density, (like 15% of the bags do), then it is checked more throughly using X-Rays. If there are still concerns about its contents, it is checked by hand and even possibly swabed to see if there are any tracable signs of explosives. I liked how this article told you some materials to make a bomb, now the only part left is to learn how to put it togeather.

Mole Day I learned about how mole day was created. It was found May 15, 1991. The idea was thought of in the 1980's by a chemistry teacher and an article was written in "The Science Teacher". According to this website, mole day was created to get students and chemist enthused about chemistry. Maurice Oehler was the founder of mole day. I also learned that the theme for mole day was "The Molar Express". This website basically was a review for me on what the mole is, such as by finding the mole for the element all you do is find out the atomic mass of that element. This website helped refine my knowledge on the mole.

Dust Explosions What interested me in this article was that such a small amount of dust could spark such a big explosion. And to see how factories seem to ignore this is what's such a big surprise. The entire work area is in danger of exploding by all the dust accumulated on the floor, and to see that only 1/8 inch of the floor was covered by this dust and an explosion occured while other work areas have 1 1/2 inches of dust cover there floor. Stiochiometry plays a part in this because of how much dust covers the floor vs. how much is need for a reaction. These factories should really consider how much dust they should allow to cover the floor before wiping it clean, or if they should leave any dust at all.

Micah, Looks good. Apparently dust is a real problem. You should see the filters around the school. Luckily they are changed regularly! MW

Sulfur Hexafluoride In this article, I learned that when you breathe in these gasses, that you can actually suffocate. It’s not so much as this fact that interested me, but rather that you may not even realize that you are chocking. The reason why you may not realize your suffocating is because you’re exhaling carbon dioxide but not inhaling any oxygen. Because you have the feeling of carbon dioxide being released from your body you don't realize your suffocating, unlike when you’re under water you are not exhaling any carbon dioxide and the feeling you’re getting is the carbon dioxide being backed up. When inhaling these gasses, it’s important that you don’t keep them in too long. I found it really interesting that the feeling you’re receiving when you’re suffocating is the carbon dioxide being backed up in your throat.

Micah, OK but you didn't mention anything about SF6? 4 stars.

Motion Detectors Something I leanred in this article was that there are three different methods used by motion detectors. Which method is used depends on two variables, what is being detected and what the situation is.The first method is that motion detectors detect interference between the source and the sensor, thus alerting it that something is there. The second method is when the motion detector sends out pulses in the radio to microwave range and the sensors monitor the reflected pattern.When an object passes through, the reflected pattern changes and thus alerts that something is there. The third and final way they work is that the sensors monitor the infared radiation comming in. When a quick change in the amount of infared radiation comes in, then it knows something is there. All warm objects give off infared, so when a human would pass by, the amount of infared radiation that was comming in shoots up.

Micah, Looks good! MW