Gladfelter,+Samuel

I like the first and third ones the best, due to them both being more detailed than the second. I like how the first one shows how to decipher whether or not its a mixture, solution, element, or compound. In the third one I like how it shows an example of each. This could help some people comprehend this topic better. The second one is okay, but it doesn't compare to the other two. It would be better for something like a quick review.

I didn't know that dyes could be separated. This was new to me, but it was pretty simple for the most part. I found it very interesting how you could separate the dyes. This whole lab was just intriguing. It also was pretty cool how you could perform all this with stuff you can find around your house, minus the special paper. I am interested to see what the outcome of separating the dyes looks like.

Measurement may not seem that important, but when you think about it, it really is. It is crucial in all kinds of things. It helps determine winners of events, new records, and countless other things. Personally, measurement is important to me because I am a cross country runner. If there were no unit of time, we wouldn't be able to know how fast we ran, because we wouldn't know how long it took us. Back to a non-personal thought, measurement can be the barrier between life and death. For example, members of a bomb squad should know how much time is left until the explosive detonates, or else they would be working in the dark. So, measurement is very important.

Well said! MW

One thing I found interesting when reading the Redefining the Kilogram article, was how it is constantly losing accuracy. I was very surprised that they didn't plan for this to happen, or else know it would happen. I definently agree however that the Kilogram should be redefined to a more stable standard, so it is more accurate. Having the standard for all Kilograms weigh less than it should is a very, very bad thing indeed. Another thing I found unique was how the kilogram was the last unit with a physical standard, but with the looks of what's happening, that's soon to change.

I found out that airport security is actually pretty touchy. I thought it was pretty secure, but from this article, it seems alot of things get through. It says that the technology is getting better and more efficient though, so airports become more secure every day. I also found it interesting how people hid the bombs. Some images showed bombs hid in weird places. One image showed a bomb hid inside a baby doll, and another inside a skull, I think. It just makes me think, with all the weird junk people bring on planes, a bomb could be anywhere.

I found it very interesting how there was a holiday for the mole. Also, I found it unique and interesting how it wasn't celebrated all day, but rather from 6:02 AM to 6:02 PM. I think this is a cool idea, and a great reference to Avogadro's number. I also found most of the themes and such pretty witty, and I liked how they combined the word mole with lots of other words to increase the celebration. In all, I think mole day is a cool idea. It spreads the idea of chemistry, and it honors something very important to chemistry, and the man who came up with it.

The article on the dust explosion was very interesting. I think it's cool, but very, very dangerous at the same time how dust can explode. However, I don't think it's something you must worry about it a different setting. I think the only reason there was enough dust to set off the explosion was because it happened in a factory. Factory are usually dirty, and seldom cleaned. Also, they process and handle material you wouldn't in a household. You would never handle an amount of sugar large enough to create that much explosive dust.

Sam,

Think about the stoichiometry. MW

I think it's cool how you can inhale sulfur hexafluoride, and have it make your voice lower. Also, I learned that it wasn't dangerous, surprisingly. Moreover, I learned about how it can suffocate you easily though, even though the gas itself won't hurt you. It stated that from continuously inhaling and breathing in more sulfur hexafluoride, your body can be tricked and suffocated. When you hold in your breath, the sensation of suffocating is caused by the build up of CO2 in your blood, rather than the lack of O2. So, if your breathing in sulfur hexafluoride, and exhaling carbon dioxide, your body won't realize it's slowly suffocating.

Sam, OK. MW

The motion detector article was about different types of motion detectors and their practical uses. I read about motion detectors that utilize light beams, radio waves, and even infared vision. I thought this was very cool. A practical use for the infared vision would be at like a bank, where it could detect a person breaking in, but not a loose bill or inanimate object flying around in the vault. A light beam motion detector is used in garage doors. This way it can detect living things as well as non-living ones. A light beam detector would be better there because it could tell if the car is in the way of the garage door, as well as a person or pet.

Sam, Good thought on the garage door opener. MW