Dalal,+Rajeev

Graphic Organizers Out of all three of the graphic organizers I liked the first one the best because it actually shows you an example of a compound, element, solution and heterogeneous mixture in picture form. The other two graphics did not show any pictures, so if someone who didn't know what matter is would find the first graphic most beneficial. The second graphic is very basic and not very informational while the third graphic is almost the same, but has more information. One difference between the graphic organizers is that the first one provides the reader with pictures to describe the classification of matter. One similarity between the three is that they all have one purpose: To explain the classification of matter in the form of a graphic. Another difference is that the third graphic has an example for a compound, element, homogeneous and heterogeneous mixture each. So the first graphic was the best because it was very thorough yet self-explanatory.

Separation of Matter Today, I learned that there are three different separation methods. They are filtration, distillation, and chromatography. Filtration is used to separate a heterogeneous mixture, such as coffee. The next one is distillation, which is used to separate components in a solution. The last separation method is chromatography which I have done last year in biology class. We did chromatography with cabbages and we saw different pigments in them. I also learned that chromatography can be used with sharpies and highlighters. Chromatography is typically used to separate pigments. I think this information is relevant because it will help us on our tests and quizzes.

Measurement In my lifestyle, measurement is a key element. Measurement is used in every day life. Let me provide you with a couple of examples. In cooking, measurement is one of the most important things. If you mess up a measurement, you will not like your finished product. Another example is playing football. Measurement is used to determine how much farther you have to go in order tProxy-Connection: keep-alive Cache-Control: max-age=0 oxy-Connection: keep-alive Cache-Control: max-age=0 oxy-Connection: keep-alive Cache-Control: max-age=0 oxy-Connection: keep-alive Cache-Control: max-age=0 20get a first down. If the referee gives Proxy-Connection: keep-alive Cache-Control: max-age=0 20bad spot, it is that much harder to get the first down. When building, the measurement has to be exactly correct or the structure could possibly fall down. You see, measurement is a vital element that we use in our everyday lives.

Jeev, Good thoughts! MW

Redefining the Kilogram Although I did find the text to be very confusing, I did pick up on a few facts. I found out that the kilogram is the last of the SI, or the International System of Units, base units that is still defined by a physical artifact. The other SI base units are the meter (length), second (time), ampere (electric current), kelvin (temperature), mole (amount of substance), and last but not least candela (light intensity). I found it interesting that the kilogram is equal to the mass of a golf-ball-sized cylinder of platinum iridium alloy. I have no idea what a cylinder of platinum iridium alloy is, but it sounds cool, so therefore the kilogram must be cool!

Jeev

Jeev, Great thoughts! Funny too! MW

Airport Security I have found information from this article to be quite valuable. I knew that the security "people" checked for anything explosive and harmful but I didn't know that they used the density of an object and compared it to the density of bombs and stuff of that nature. Plus, I thought that finding 20 firearms per week is a lot. I can't believe that many people are dangerous. Why would they want to hurt innocent civilians? That is something I will never learn. I think as technology advances, TSA will be able to identify bombs or anything dangerous a lot quicker. Before 9/11, our security was never this uptight, but with growing danger in our world I am glad we have this extra protection. The substantial and revelant information relates to our class because we are just learning about density and density is used to compare bombs and other materials. I would have never thought that density is very important in our world and for our protection.

Jeevyy!!!!,, I thought that your post was very thorough, understanding and comparative because you mentioned how advanced sirline security has gotten since 9/11, and how dangerous people can be, and how the different technologies can read and detect harmful objects with density.

Mole Day I found the website highly interesting. Ok, actually not, although I did learn a few things. One thing I learned was Mole day is from 6:02 AM to 6:02 PM. I wonder why it's those numbers? I guess I'll answer my own question. It's because a mole, also Avogrado's number, is 6.02 X 10^23 power. I found it somewhat interesting that there is a Mole Day pledge. That probably took a lot of time and thinking. Also, I learned a mole is a mass, usually expressed in grams, whose number is equal to any given molecule. This is what%

Dust Explosion What from I got out of it, a sugar plant, covered with dust, exploded in Georgia. The dust lying on the floor created an explosion. This is because the dust was disturbed and was thrown into the air, mixing with the oxygen, igniting an explosion. Nine people were killed and many more were injured. Sugar and oxygen reacted with each other and yielded an explosion. The explosion can even be started from static electricity. The article kept me interested because it basically said that if anything is not handled properly, it could be deadly. Who would have thought that sugar would be dangerous? Well, definitely not me. Stoichiometry can be used to determined how much of an object, in this case sugar, is explosive. That’s my post.

Jeev, Good job!

Sulfur Hexafluoride

Although breathing in gases may be fun every once in a while, there are serious effects that come along. For example, if you breathe in helium and talk with a high pitched voice and exhale all the gas in your lungs constantly, you are actually suffocating yourself. This is evident when people pass out when inhaling those gases, like helium and sulfur hexafluoride. Also, I learned that, unlike helium, when sulfur hexafluoride is put in a balloon, it doesn't deflate, but increases the balloon in size. This is because helium atoms are constantly moving, so therefore they escape from the balloon quickly. Another thing that I found interesting was that sulfur hexafluoride doesn't make your voice high-pitched, but instead makes it deeper. I want to try this something, knowing the risks involved!

Jeev, All things come with an element of risk I suppose. MW

Motion Detectors

I found this article highly interesting. I learned many new things about motion detectors, including they use three different methods. The first method is using infrared radiation directed toward a photo sensor. When an object goes past the light beam, it is blocked, therefore activating the motion detector. That is when you are BUSTED!! The other method motion detectors use is monitoring the reflection pattern. When the reflection pattern changes, you know immediately an object went by. Last but not least, motion detectors detect the infrared radiation. When a warm object goes by, infrared radiation is given off. Those are the three ways motion detectors go off!

Jeev, I see you have added a bit of flair to your post once more! :) MW