Gardner,+Dusty

8/27

The first and third charts are similar because they both give examples and contain most of the same information. The second and third charts are kind of similar because they both have the same structure and the same way of showing matter. The difference within the charts are number 2 because it doesn't give any examples. The chart I prefer is chart three because it is easier for me to understand and it gives examples of what a compound and element is. It also shows what a mixture breaks down into. This makes it easier for me to identify what certain things are as far as a compound, element, and mixture.

8/28

I didn't know scientists used distillation to separate mixtures. I didn't think they could be separated. They also use distillation to get oils out of certain mixtures. I didn't know that industrial distillation separates crude oil into tar, gasoline, jet oil, and diesal fuel etc. I thought it was interesting that chromatography was used to separate colors. It shows the colors used in which the original color was made. I also found it interesting that you can use chromatography to find out if it was your pen you used for foreaging signatures on checks. I think that it would be a long process.

8/31

Measurement is important to me because I really like to cook and bake different things at my house. You need measurement to bake cookies, brownies, or even a cake because there are certain ingredients that need to be added so it has the right flavor and isn't disgusting tasting. If you were to add the wrong amount of sugar, eggs, or milk it might now come out right in the oven and then you just wasted the mix. Adding too much sugar to cookies might cause them to be too sweet. Also adding too many eggs to cookies might make them watery or taste a little gross. So measurement is very important for cooking.

9/7

Something that I found really interesting about the article "Redefinig the Kilogram" was the kilogram is one of the seven base units of the International System of Units. A couple things that I learned from the article was the kilogram is secured in a vault at the International Bureau of Weights and Measures. I also found it interesting that they have six copies there. Something else that I learned in this article is the kilogram is the last of the SI base units. This was also interesting to me.

9/14

I was suprised to find that airports find about 20 firearms per week. I didn't know airports used sensors that could detect materials in which there densities match explosives. I didn't know that density was used in checking luggage and that it determind whether it passed the inspection, where you go to get on a plane, or whether it had to be checked out manually. I also didn't know that airports use a method where the luggage is broken down into mass, size, and shape. This method detects compounds. This article relates to chemistry because it talked about chemicals, compounds, and mass. The article also had a lot to do with density which relates to what we are studying in class now.

10/7

I thought it was interesting how Mole Day is celebrated on October 23rd of every year. Also that it's celebrated from 6:02 a.m. to 6:02 p.m. Its celebrated at those times because mole is 6.02 x 10^23. I learned that "one mole of any substance contains Avogadros number of molecules or atoms of that substance." Another fact I learned was that the first person to discover the mole relationship was Amadeo Avogadro. He finally got credit for his discovery after he had died in the year 1858. I thought it was interesting how scientists made a pledge for Mole Day. I also thought it was interesting how they bend over and face the earth when they say the Mole pledge.

11/3
I thought this article was interesting. I learned that the finer a solid material becomes that the reaction of the substance is faster and the explosion is a lot bigger. I never thought a sugar plant would cause an explosion and injure people. I wonder how often this occures at something such as a sugar plant? This relates to stoichiometry because in excess, a lot of powder makes a big reaction and since the powder is extremely explosive when it reacts with oxygen, that is exactly what happened. Because the powder is fine this also speeds up the reaction.

Dusty, Good thoughts but sugar dust is never actually in excess. Excess oxygen is always available. MW

12/4

I never knew that sulfur hexafluoride is used to make gun powder and matches. I thought it was cool that if you fill a balloon with sulfur hexafluoride would expand over time and eventually pop when it gets to full. I think it would be cool if we tried it in class. I also found it interesting that a helium balloon leaks over time because the particle are so small and less dense that it seeps through the pours of the balloon. I wonder if you would fill a balloon with sulfur hexafluoride if it’s so dense that it would fall to the ground like argon gas does and then expand and eventually pop?

Dusty, Yes. It would be a cool experiment but SF6 is very expensive. MW

12/15

This article is similar to what were have been talking about in school because it talks about electrons and double bonding. It also talks about ultraviolet light which is 400 nm. This is also what we are talking about in class. The article also talked about infrared, which is a visible light, such as what is used on scanners. We also learned about wavelengths and frequencies in class. In the article it says that a wave at a certain frequency is sent out and it creates a pattern and when someone walks into that wave they break it and then the light turns on. This is how a motion detector works.

Dusty, OK. Infrared is not visible though. MW