Rehman,+Olivia

This article about motion detectors was very interesting because it related to many things that I have heard of and even witnessed in real life, such as the garage doors and the automatic doors. I have always just thought that motion detectors sense movement, not necessarily light or temperature. It relates to the chemistry we are learning now because it discussed waves and how their traveling affects motion detectors. Some detectors wont pick up smaller things because they give off less infrared radiation than others. The more there is the easier it is to detect.
 * Motion Detectors:

Olivia, Looks good! MW

Sulfur Hexaflouride: Overall I think that sulfur hexaflouride is pretty neat. I thought it was interesting when we also watched the video and the guy talked funny. I found it fascinating in the article when they said that while you are breathing this in your body doesn't recognize that you are suffocating! It made sense though when they talked about people passing out because of helium because that is definitely not unheard of. But still, you would think that your body would feel like it needs oxygen. I also think it is cool that a balloon will expand with sulfur hexaflouride, it would be fun to watch.

Olivia, I wonder how long it would take for the balloon to pop? MW

Dust Explosions and Stoichiometry:** (Plant Blast Rekindles Dust Debate) The reaction took place under these circumstances because there was a lot of dust in the factory. This dust had been gathering on the floor and in vents and other spaces unnoticed because there is not much of it. But 1/8 of an inch can ignite in seconds if a spark is let out. The dust (sugar) was thrown into the air after a first explosion and then when it mixed with the oxygen it was ignited. The sugar was not reactive til it was mixed with oxygen, this is because when the sugar was laying in the vents or on the ground the oxygen couldn’t get to it as easily, but when the first combustion moved the dust and mixed it in the air it became reactive to even a spark, relating to the experiment we did with the pumpkin. This relates to stoichiometry because of the reaction taking place and the process it took for the dust to ignite.

Olivia, Well stated! MW

As I was reading I saw that the page said, "Mole Day was created as a way to foster interest in chemistry". I thought that this was interesting because if I were to ever hear about mole day I would think of it as the animal mole, not to do with chemistry. But now that I have had chemistry and we have discussed it I know what it means! The National Mole Day Foundation was made for the same reason, to get people enthused about chemistry. I think it is interesting to see how people care about mole day and want people to know. I wonder what kind of activities the NMDF have come up with to do. It says many schools participate in National Mole Day. Does ours?
 * Mole Day:**

Olivia, Well we obviously honor mol day but really don't have tons of celebration. Did you find anything scientific on the website?? 4 stars.

This article was very interesting in many ways. I think it is shocking how many people try and sneak things on plans, and why they do it. The article says that TSA still finds bout 20 firearms per week at airport checkpoints. It is very challenging for them because there are so many different things that can be used to make bombs and such. Also, I think it is fascinating how they already have so many things that you must go through for security and they are still searching for more. It would be interesting to know how they develop these security methods. I would be very scared if I was looking at a screen and saw a bomb in someone's bag.
 * Airline Security:**

In the article, Redefining the Kilogram, it states that a critical part of how the world works is determining the physical constants of the universe and establishing standards for measuring them. The kilogram is the last of the SI base units that is still defined by a physical artifact. The kilograms international prototype is kept locked up in a vault near Paris, along with 6 other prototypes. This international prototype has lost about 50 µg over the years. This can cause imprecision and uncertainty to the other SI Units based on the kilogram. Scientists are trying to make a new kilogram standard based on Planck or Avogadro's constant. This new standard would only be useful to some professions and would cause some changes to others. But people are trying to get this proposal into action.
 * Redefining the Kilogram:**

Olivia, Well written! MW

Something in my life that is important to me and involves measurement would be track and field. I throw shot put, discus, and javelin. Each of these events involves measurement in order to see how far you have thrown the implement. The measurement decides how you have placed later resulting in your teams’ placement. This is important to me because if someone were to measure my throw wrong or someone else’s it could result in me losing the meet or someone else winning when they shouldn’t have.
 * Why is measurement important to you?:**

Olivia, Definitely measuring your distance in a field event is critical! Good post! MW

In the video about crude oil I learned a few things because I have never heard of this before. Crude oil is found on the earths crust. It is dug up from the ground and in order to make it useable to us and with other things they use distillation to extract the oil into useful fractions. I found it interesting that crude oil is flammable and that because of this it is heated at a lower degree then other distilled items. The most relevant thing the video went over according to our class would have to be the review of distillation. It discussed it and explained more specifically how the process worked, which was good because we were discussing it previously.
 * Separation of Matter:**

The graphic organizers were each helpful in a different way. I liked the first one best because it states exactly why the substances are what they are and what makes them different from each other. It includes questions. Along with this it shows images, so you can see the difference along with reading about them. The second chart shows more clearly what a pure substance and a mixture are. Its main thing was to show us the names. The third chart just helped by giving examples along with the names, which I liked cause it helped to visualize and understand more. They were all similar because they included names and charts, and all the groups.
 * Classification of Matter Graphics Forum:**