Hose,+Dylan

__//**Mentos in Soda**//__ The chemistry behind the old trick Mentos in soda is very unique. I always knew when you put Mentos in coke that it would explode. I’ve seen science classes do it for experiments but never knew the science behind it. I noticed before to that the Mentos sank to the bottom because they were more dense, as said in the article. The article also mentions how the Mentos form a geyser, which I also knew. I learned that the explosion is caused by the high amounts of CO2 that are pumped into the bottles at the bottling factory. Another thing I learned was learned what a nucleation site is. A nucleation site is a term for saying where things get started. I read that if you dissolve the Mentos in water then pour the that solution in the soda very minimal explosion occurs.

Dylan, Great post! You really hit the main points. 5 stars. MW

__//**Distillation**//__ I find the distillation process really neat. Separating color from a liquid is really interesting. I learned that distillation causes the hydrocarbons to separate. They are separated because the hydrocarbons with low boiling points vaporize. The hydrocarbons with higher boiling points are left behind because it is not hot enough to vaporize. I think the distillation process will be very relevant to our class especially during experiments. We might have to use it often to separate already pre made liquids.

Dylan, OK. 5 stars. MW

//__**Motion Detectors**__// With motion detectors, I know that they sense movement, however I do not know how that happens. I know that they can be used to turn lights on and off like they do in school. When the motion detector doesn't sense any movement for a certain period of time it will turn off the lights in the room. Then, when it sees movement the lights will turn on. The last thing that I already knew about motion detectors is that they can detect heat as well. I learned that there are three different ways to use a motion detector. You can use a light which would be an infrared radiation along with a sensor. They can also send out pulses of energy waves to detect motion. Third, they motion detectors can use sensors to pick up on all the infrared radiation close by. I also learned that your eyes are like photo sensors that react from chemicals and send the brain different signals from different movements. I found it interesting when I learned that when a motion detector is picking up on movement that it depends on the amount of individual particles not the mass of the object.

Dylan, Your last comment might be reversed if you are talking about the analogy of ping-pong balls and a steel ball. Overall good job! 5 stars. MW