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Friday, October 28

  1. page Brown, Tre edited Motion Detectors I found the article about motion detectors to be very interesting. One thing I kn…
    Motion Detectors
    I found the article about motion detectors to be very interesting. One thing I knew about motion detectors was that they emit a beam of light that can be triggered when someone crosses through the beam. This occurs in most garage doors. Another thing I knew was that waves that have low frequency are red and waves with high frequency are violet. The last thing I knew about motion detectors is that Einstein created the theory of photoelectric effect because we learned about it in class. One thing I learned from the article was that radio waves set off garage door sensors and police gun radars. Another thing I learned is that motion detectors can't detect people through windows if one were to be placed in a building. The final thing I learned is that the eye is a type of photo sensor.
    Tre,
    Looks good - but late. 4 stars. MW

    Video post
    I learned that fractional distillation is used to seperate compounds into different fractions of elements. You can boil the compound until it starts to boil and collect the material that is condensed at the end. Then the temperature is raised and the next substance is boiled and collected through condensation. Distillation helps with seperating substances that can't be filtered out. Distillation is a helpful tool to many scientists.
    (view changes)
    5:48 pm

Wednesday, October 12

  1. page Brown, Tre edited Motion Detectors I found the article about motion detectors to be very interesting. One thing I k…
    Motion Detectors
    I found the article about motion detectors to be very interesting. One thing I knew about motion detectors was that they emit a beam of light that can be triggered when someone crosses through the beam. This occurs in most garage doors. Another thing I knew was that waves that have low frequency are red and waves with high frequency are violet. The last thing I knew about motion detectors is that Einstein created the theory of photoelectric effect because we learned about it in class. One thing I learned from the article was that radio waves set off garage door sensors and police gun radars. Another thing I learned is that motion detectors can't detect people through windows if one were to be placed in a building. The final thing I learned is that the eye is a type of photo sensor.

    Video post
    I learned that fractional distillation is used to seperate compounds into different fractions of elements. You can boil the compound until it starts to boil and collect the material that is condensed at the end. Then the temperature is raised and the next substance is boiled and collected through condensation. Distillation helps with seperating substances that can't be filtered out. Distillation is a helpful tool to many scientists.
    (view changes)
    5:31 pm

Tuesday, October 11

  1. page Sanchez, Aaron edited ... I read the article about salting the roads I had obviously seen the local pendot men out layin…
    ...
    I read the article about salting the roads I had obviously seen the local pendot men out laying down salt. I have also seen them out before the storm even hit laying down diceing salt to keep the roads from freezing from the snow but I did not know the chemical change behind the prevention of the formation of ice. I never really thought about it before how the snow that melted into water would dissolve the salt causing the solution to change making the freezing point lower. I also thought it was interesting that the melting process happens only when the reactive surface of the pure ice touches the surface of the salt crystals, reacting in such a way that the ice then melts into water that then forms the solution of salt water making the freezing point lower like when preventing the formation. I know from media and my own prior knowledge that conditions in Alaska are harsh with wintery conditions, however I have learned now that they can't get all of the snow and ice off of the road (previously I had not thought they could) so they use gravel and sand to add traction to the treacherous roadways. My overall all opinion on the article is that I really did enjoy it, I learned some new interesting facts that I didn't know.
    Aaron Sanchez
    Aaron,
    OK. Looks good. That article is one we often read in AP Chemistry. 5 stars. MW

    (view changes)
    5:57 pm
  2. page Sanchez, Aaron edited ... Aaron, Well written! This process is a huge and messy industry. Oil refineries are expensive …
    ...
    Aaron,
    Well written! This process is a huge and messy industry. Oil refineries are expensive and smelly. :) 5 stars MW
    Intro to Chem
    I read the article about salting the roads I had obviously seen the local pendot men out laying down salt. I have also seen them out before the storm even hit laying down diceing salt to keep the roads from freezing from the snow but I did not know the chemical change behind the prevention of the formation of ice. I never really thought about it before how the snow that melted into water would dissolve the salt causing the solution to change making the freezing point lower. I also thought it was interesting that the melting process happens only when the reactive surface of the pure ice touches the surface of the salt crystals, reacting in such a way that the ice then melts into water that then forms the solution of salt water making the freezing point lower like when preventing the formation. I know from media and my own prior knowledge that conditions in Alaska are harsh with wintery conditions, however I have learned now that they can't get all of the snow and ice off of the road (previously I had not thought they could) so they use gravel and sand to add traction to the treacherous roadways. My overall all opinion on the article is that I really did enjoy it, I learned some new interesting facts that I didn't know.
    Aaron Sanchez

    (view changes)
    5:35 pm
  3. page Seiple, Savannah edited ... Savannah, I'm glad you read the Harry Potter article. It looks like you picked up a few good …
    ...
    Savannah,
    I'm glad you read the Harry Potter article. It looks like you picked up a few good items! 5 stars. MW
    I found this article interesting because I have always wondered how different types of motion detectors worked. I already knew that some motion detectors, such as the safety feature used with garage doors, used a light beam aimed at a photo sensor. I also knew that home security motion detectors using lights, like the one first mentioned in the article, would usually not turn on unless a human being came near it.I didn't know that some motion detectors used sensors to monitor infrared radiation. I guess that explains why inanimate objects usually don't set off motion detectors. I also didn't know that some motion detectors used a method similar to echolocation, which I knew was used by bats, to detect when an object was near
    -Savannah Seiple
    Savannah,Be sure to include 3 things you knew and 3 things you learned- looks like you just have 2 of each. 4 stars. MW

    (view changes)
    4:19 pm

Monday, October 10

  1. page Reeves, Holly edited ... Holly, Looks good! You picked out some interesting points from this article! 5 stars. MW ..…
    ...
    Holly,
    Looks good! You picked out some interesting points from this article! 5 stars. MW
    ...
    different color.
    Holly,
    A little short (approx 60 words) . 4 stars. MW
    One thing I knew before reading the article was that some animals such as snakes and bats have sensors that use waves to located possible prey and obstacles. I also knew that one type of motion detector relies on a light beam because my garage door also uses this technology. Another thing I knew before was that Einsten received the Nobel Prize for his work in photoelectric. Something I wasn’t aware of was the fact that there are so many different types of motion detectors. I also learned that our eyes work similarly to a motion detector. Lastly I didn’t know that detectors were able to only detect warm blooded things like humans and animals.
    Holly,
    OK. Looks good! 5 stars. MW

    (view changes)
    8:04 am
  2. page Ricchiuto, Sarita edited ... move faster. Sarita Ricchiuto Sarita, OK. Your partly right about the boiling points. 5…
    ...
    move faster.
    Sarita Ricchiuto
    Sarita,
    OK. Your partly right about the boiling points. 5 stars. MW
    I knew that some motion detectors required the infrared light given off by our bodies to lite. I also knew that our eyes are a form of photo sensors for visible light. I knew when light shines on any surface, the electrons can get ejected. I had no idea that motion sensors relied on the ability of light to initiate an electrical current. I also found it interesting that light can behave as a particle in some cases not just a wave. Lastly I learned that low frequency lights cause no electrons to ejects whereas, high frequencies send electrons flying out of light!
    Sincerely,
    Sarita Ricchiuto
    Sarita,
    OK. Looks good! 5 stars. MW

    (view changes)
    7:46 am
  3. page Wingert, Christian edited Motion Sensors Coming into this article I already knew that some motion sensors have a beam of lig…
    Motion Sensors
    Coming into this article I already knew that some motion sensors have a beam of light that goes to a photo sensor. When the beam of light gets blocked that is how the sensor knows somthing is there like the safety sensor on garage doors. I also knew that Einstein is most famous for E=mc2 but also for his theroy of photoelectric effect because we learned that in class. The last thing I knew before reading the article was that humans and animals give off infrared radiation (IR) which sensors and night vision goggles can pick up. One thing I learned from reading this article was that a device might send out a pulse and use sensors to monitor the reflection patterns. The motion is then detected when the reflection pattern changes. I aslo learned that photo sensors that were used in the motion detectors rely on lights ability to make an electric current known as the photoelectric effect. When the light of sufficent energy is shined on a given surface it causes electrons to be ejected. The last thing I learned was that Rattlesnakes have "pits" on the sides of there heads which allows them to detect any IR nearby which is why they can sneak up on prey without them even knowing.
    Christian,
    Once again a good post! 5 big stars. MW

    Crude Oil Video
    In the video I learned that they have to separate the solution by using the distillation method. I already knew what the distillation method was and how it happened because we learned in class today. Crude oil would be useless if the solution was not separated. To start out they had to put it in a tube and have it heated by a Bunsen burner or electric burner. Then the solution will heat up, reflex, and condensate traveling down a long tube. Then the finished solution would fall into a flax just how we learned it in class and what the demonstration showed that we did in class. Another way you could separate a mixture is using the filtration method but that wouldn't work for this solution they showed in the video. You would put the solution in a funnel and it would trap the solid in it and pour the liquid in a flax.
    (view changes)
    5:24 am
  4. page Wesstrom, Austin edited Motion Sensors I have a motion detector at are house also, ares is the laser beam one that when yo…
    Motion Sensors
    I have a motion detector at are house also, ares is the laser beam one that when you cross the beam it doesn't hit the other side and it prevents the garage door for crushing the car or me. A con for this device is that you can jump over it so the beam isn't interrupted. The SONAR type one is a good device for motion detecting because it is hard to avoid really and found it very interesting how this motion sensor worked what I understood what it did was it sent out waves and that when the wave was obscured it would turn on a light
    ...
    critter glow.
    Austin,
    Much better! I see you made some connections with your personal experiences here. Be sure to clearly catalog things you learned and things you knew. 5 stars. MW

    Something I knew was what distillation is it is when you boil water and it goes through this tube through the sidearm into the collection tube. As the temp rises other carbons are collected. I found the reflux really interesting when the water condenses at the top and falls dow into the tube.
    Austin,
    (view changes)
    5:21 am
  5. page Shue, Dylan edited Motion Detector Response: Three things I learned from the article was that motion detectors often …
    Motion Detector Response:
    Three things I learned from the article was that motion detectors often use a light source to detect and make the light turn on. I also learned that motion sensors can also be activated by a heat source like and infrared light. I also learned that the motion sensors are activated by echos and sound.
    Dylan,
    Please follow the entire prompt - Write about three things that you knew. Also follow the rubric. 3 stars. MW

    Video response:
    I didn't know that crude oil itself was useless. I thought that you could just use the oil in the same form you get it at. I think it is interesting that the oil industry separates tings out of the oil like we did today in class. They do basically the same thing to the oil that we did to the water and chemicals. The oil industry just does it on a much larger scale. I also found it very interesting that you can make many different kinds of oil from crude oil such as Gasoline, Kerosene, Diesel oil and so on.
    (view changes)
    5:16 am

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