Gardner,+Sarah

Mentos and Coke This article was about what happens when you put mentos in a bottle of coke. This article relates to chemistry because in chemistry there are lots of chemical reactions and the mentos and coke explosion is a chemical reaction. One thing that surprised me was that the warmer a soda is the less fizz there is. I now know to keep sodas in the fridge to keep them tasting better. Another thing that surprised me was that fruit flavored mentos make a better explosion than mint ones.

Sarah, OK. Kind of minimal but you answered the prompt. 5 stars! MW

Redifining the Kilogram The kilogram is the last SI base unit that is still defined by a physical property of nature. The prototype is kept in a vault with six other copies of it. The international prototype has actually lost 50 ug over the last couple of years. It really surprised me how 50 ug's is so small but it's such a big problem that the prototype lost 50 ug's. Another thing that surprised me was how small the kilogram prototype is. The article says its only about the size of a golf ball and I would have expected it to be much bigger. This article relates to chemistry because it's all about the kilogram and in chemisrty we use kilograms to way things.

Sarah, I guess your MVP is the size of the artifact. Since it is so small that means Pt and Ir must be pretty dense! 5 stars. MW

Crude Oil The crude oil mixture is useless so you have to separate it using distillation. It's called fractional distillation. Fractional distillation is when you separate a mixture into it''s different parts. It is used on a bigger scale in factory's. I found that you have to separate the crude oil to use it to be very interesting. I also found it interesting that there are some long chains of atoms and some little ones. This relates to chemistry because it uses distillation which is something were talking about right now.

Sarah, Such a colorful page! Good points. 5 stars. MW

Motion Detectors I found this article to be really interesting because it's something that i can relate to because we have a motion detector light at my house. This article relates to chemistry because its about wave lengths and radiation. I found it really interesting about how some animals have their own motions detectors to show them where things are in the dark. It surprised me that so many every day objects like elevators and garage doors had motion detectors on them.

Sarah, You didn't follow the prompt. You were supposed to write about 3 things you knew and 3 things you learned. 4 stars. MW

Where do Chemical Elements Come From? 25 word abstract Every element on earth was once inside a star then thrown across the universe when the star exploded. Both nucleosynthesis and the S process makes elements.

Sarah, Good. 5 stars. MW

Sugar an unusual explosive This really relates to chemistry because it talks about chemical equations and mols. It also talks about combustion which we learned about in class. One thing that interested me was that more than 350 sugar explosions have happened in the U.S.A. and people aren't that concerned about it. I think there should be more research done to try to prevent explosions and more deaths. Another thing that interested me was the comparison of the explosion to a burning marshmallows and digestion. The comparison really helped me understand about it. I would be interested in learning more about digestion and explosions.

Sarah, Looks good! Yes I think if I was a factory worker I might be concerned about the amount of dust laying about. 5 stars. MW

Helium Balloons The first important point of the article was about buoyant force. Buoyant forces are the greater forces that push a helium balloon upward away from the earth. The second most important point of the article was about where buoyant forces come from and how they work. When there are slightly more molecules hitting the bottom of the balloon it gets pushed upward. The third most important point is Archimedes princeple. The Archimedes princeple is when the buoyant force acting upward on an object is exactly the same as the weight of the fluid that is being displaced. An example of this would be a liter of air weighs .0028 pounds and it has a buoyant force of .0028 and it weighs the same as the air the weight of it would be 0 pounds. I think the most important point of the article is explainging buoyant forces and how they work. The article relates to chem because it talks about gases and pressure and thats what were learning about in class right now.

Sarah, OK. Major points are there. 5 stars. MW