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8/24/2007
Find an web article from a reputable news website that contains information about any type of projectile. The article must relate to some science topic this could include something having to do with the projectile of bullets or weapons but should not focus on killing!Write a short (1 paragraph) summary of the article and then describe how anything you have learned in the past week about projectile motion might relate to it (second short paragraph). Finish with a citation to the web article. Enter all of this under "Entry" below.

//Entry:// Cited from: vindy.com 2007 http://www.vindy.com/content/local_regional/308800031279476.php

The web article I read was called “Officials rule out tornado”. It was very cool because it talked about projectile motion, microburst and tornados. Microburst are strong blast of wind starting from a high altitude and move downward at a fast rate. They are not as powerful as a tornado, but they can be just as devastating depending on how strong the winds are. Microburst, to be classified as a tornado, must be blowing in a projectile motion and have winds of at least 100 mph.

//Comment 1: Over-all, it had an interesting focus. However, it was written in first person, and it should have been in 3rd person. Also, it should have been 2 paragraphs instead of just one. The whole piece would be better if in the second paragraph, there was some information that tied it a little more to what we have been learning in class. I had never heard of a microburst before, so it was a new and interesting topic.// It seems to be a good summarization of the article, and seemed to cover a few interesting main points. I got a pretty good understanding of what a microburst is, but a little more elaboration would make it clearer. I was a little confused by how a microburst could blow in a projectile motion, though. It also needs an MLA citation. It was generally a very interesting topic. - Elizabeth S. Comment 2: //Jason,// you have not created a MLA citation. To create one you may want to go to the Citation Maker as demonstrated in class (see the link on the front of the CAscience7.com webpage.) You also need to write a second paragraph that relates this article to what we have been learning in class. I do like you writing style in the first paragraph, although it should be in 3rd person. - JT

**9/24/2007**
Reflect upon the mystery density cube experiment. You may write in first person. Create a long paragraph addressing these questions:

1.) Was the scientific method necessary in this experiment? If not, why? If so, why? 2.) What made this experiment difficult? Or was it easy? 3.) Is density very important in finding the identity of an unknown substance?

//Entry:// My team uses the scientific method it was necessary to use in this experiment. If we did not use the scientific method we would be just randomly guessing what the cubes were. My team’s scientific method was that we made a hypothesis on the cube and what they could be. Then Adam and Jen did the quantitative data research and I did the qualitative data research on the cubes. The part that was challenging was researching what the cubes were because two cubes were almost exactly the same except one was darker. The part that was easy was doing the descriptions. Density is very important in finding the identity of an unknown substance because if you have a substance which is the same color and shape you can only tell the difference by their density. The conclusions were made also the anylizations were finally done. The easiest part of this experiment was to do the qualitative data because it was.

//Comment 1: This is a pretty good summarization of the whole experiment. However, you should not use last names since this is posted on the internet. Also, why was finding the qualitiative data the easiest part of the experiment? The first sentence is a little bit unclear. Does this mean that the scientific method was necessary, so your team used it? The last sentence does not seem necessary. The paragraph was over all a good length and mostly answered all of the questions. Elizabeth S.// Comment 2:

10/16/2007
What is a flame test in your own words? How does this relate to the use of chemicals in fireworks? Make sure to include your MLA citations you may not use Wikipedia!

//Entry:// What I think a flame test is when you test a flame before a experiment. Because if you don't do a flame test before a experiment that requires fire something might blow up or someone or maybe something might catch on fire. This relates to the use of chemicals in fireworks by doing a test run to see if the firework is safe or not.

The function of the oxidising agent is to produce the oxygen needed in order for the mixture inside the firework to burn. These oxidisers can be nitrates, chlorates or perchlorates. Nitrates only give up a third of their oxygen as the equation above illustrates. On the contrary, Chlorates get completely reduced as they are better oxidising agents and so cause an even more spectacular reaction. This however does cause the reaction to become extremely explosive. Perchlorates contain even more oxygen but are less likely to explode than chlorates due to their increase in stability. They follow the reaction below: Sited from: Gondhia, Reema. "Composition." __THE CHEMISTRY OF FIREWORKS__. 16 Oct 2007 <http://www.chemsoc.org/ExemplarChem/entries/2004/icl_Gondhia/index.html

//Comment 1://

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11/2/2007
Go to this site: [|http://www.visionlearning.com/library/module_viewer.php?mid=55 .]Click on "Watch the Reaction with Sodium and Chlorine" In your own words and in third person, create a blog entry describing the reaction and explaining what is happening in terms of the bonding. Write a long paragraph. Explain in detail.

//Entry:// The chemical reaction with the sodium metal and chlorine was very interesting. It was strange when the sodium burst into flames. That was a cool flash animian.

//Comment 1:// This is not a long paragraph it is only three sentences long. It is not described well enough and it does not explain the topics that the prompt states. The word animation is misspelled on the last line. This entry could have been much better with a little more effort. Ian H.

Comment 2: Jason did not show that he thouroughly understand the experiment and the outcome. He did not say anything about how the atoms bond to cause the sodium block to ignite. Jason does not explain his observations before, such as what the sodium and the chlorine looked like. Although the sentences he has are good, and true sentences, i think he could have added more about the experiment and how it works. -Kjersti K.

Revised Entry: Table Salt is the end product of two elements. The elements are Sodium metal and Chlorine. The Sodium metal starts to burn with the Chlorine when they are in the same closed container. The metal will burst in to flames. The atoms in the elements lose and gain eletrons in a matter of seconds. When the Sodium Metal stops burning you have NaCl or Table salt.

11/08/07
What was your favorite project, experiment or topic this trimester and why? (projectile motion, density cube experiment, podcasts, chemical reactions, flame tests, etc.) You can also comment about the snakes. What do you think that you excelled at this trimester? How could you have improved your performance in Science 7? (Make sure to check your spelling and grammar).

The flame tests because we got to work with fire. :-) When we worked with the chemical expeiriment.

Bonding Screencast Project
1.) What is your compound? 2.) Is it ionically or covalently bonded? 3.) What are its common uses? 4.) Which atoms in the compound are metals? Which are nonmetals? 5.) How do the atoms come together to bond shanng or giving away their electrons. You will use electron dot structures to show this. If It Is ionicafly bonded which Ion is the cation and which Is the anion? Remember. covalently bonded compounds DO NOT form ions.

Chlorine2 or Cl2
 * General Characteristics |||| A yellowish green, nonflammable and liquefied gas with an unpleasant and irritating smell. ||
 * Health Hazards |||| A Toxic Product, Attacks the eyes and mucous membranes and eyes. Contact with the skin causes severe burns. Causes lung damage ||
 * Material Recommendations |||| Highly corrosive in moist conditions. Dry Gas use: Copper, stainless or Monel. Moist use: Tantalum ||
 * TLV-TWA |||| 0.5 ppm ||
 * Flammable Limits |||| Nonflammable ||
 * DOT Class / Label |||| 2.3 / Poison Gas ||
 * Molecular Weight |||| 70.9 ||
 * Specific Gravity |||| 2.473 @ 70 F ||
 * Specific Volume |||| 5.4 cu.ft./lb @ 70 F ||
 * CGA Valve Outlet |||| CAS Registry No. ||
 * UN Number |||| 660 7782-50-5 1017 ||

Uses Chlorine is a clear amber-colored liquid about 1.5 times heavier than water. Gaseous chlorine is greenish-yellow, about 2.5 times as heavier than air.Chlorine uses include water purification, sanitation in of industrial waste, sewage and swimming pools. Also the bleaching of pulp and textiles and manufacture of carbon tetrachloride. And glycol and numerous other organic compounds and phosgene gas.

Citations "Chlorine (Cl2) (cl2) - Properties, Purity and Packaging, including electronic and UHP grades - -." 26 May 2007. 27 Nov 2007 <[|http://www.c-f-c.com/index.html>.]

1.) Is it ionically or covalently bonded? Chlorine is a covalenty bonded. The covalent bond is Non Polar. A Non Polar covalent bond is when the same atoms (ex. Cl2) share their electrons equally.

2.) What are its common uses? Chlorine is a clear amber-colored liquid about 1.5 times heavier than water. Gaseous chlorine is greenish-yellow, about 2.5 times as heavier than air.Chlorines common uses are water purification, sanitation in of industrial waste, sewage and swimming pools. Also the bleaching of pulp and textiles and manufacture of carbon tetrachloride. And glycol and numerous other organic compounds and phosgene gas.

3.) Which atoms in the compound are metals? Which are nonmetals?

4.) How do the atoms come together to bond shanng or giving away their electrons. You will use electron dot structures to show this. If It Is ionicafly bonded which Ion is the cation and which Is the anion? Remember. covalently bonded compounds DO NOT form ions.

1/3/2008
Our next unit is about electricity and electronics. Observe the following graph, Graph 1. Write at least five sentences for each of the following questions. Write in third person. Directly cite data and identify the graph (1). 1.) Which electricity source in the US has increased the greatest amount over the time period shown in the graph? 2.) Which of the sources listed below directly contribute to global warming? Provide evidence and explain using the Internet (MLA citation). 3.) Describe the overall trends from 1972 to 1985 regarding the US's sources of electricity. [|This graph can also be seen at this LINK.]

Here is an example statement: "Graph 1 shows that from 1960-1965 there was a steady increase in the use of coal as a source of electricity. It rose from roughly 0.2 trillion killwatthours to 0.5 kilowatthours.

Entry: 1.) Which electricity source in the US has increased the greatest amount over the time period shown in the graph? The use of coal.

2.) Which of the sources listed below directly contribute to global warming? Provide evidence and explain using the Internet (MLA citation). One of the souces that contributes to globbal warming is Fosil fuels.

3.) Describe the overall trends from 1972 to 1985 regarding the US's sources of electricity. Graph 1 shows that in 1972 to 1985 Nuclear Electric and also Petroleum and Natural gas power is steadily increasing. Because it is being used more and more. And now it is Very popular as fuels. This concledes my bloging.

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2/05/2008
What is a watt? How do you calculate the amount of electrical power that is used in a circuit? Finally, if a lamp with a 200 watt lightbulb burned for 24 hours straight (you forgot and left it turned on), how many kilowatt hours would it use? Make sure to write in complete sentences and in third person. Explain how you calculated the amount of kilowatt hours that would be used in the question above.

Entry: A watt is a unit in witch electrical potential is measured in. You take the number and multiply it by 1000 and write it as X000 kilowatt hours.

Comment 1: Jason, you use great vocabulary. However, you may want to review the definition of a watt. You are on the right track with the definition, however it is not the unit that electrical potential is measured in. You also may want to look over the the equation for finding watts. Watts is current multiplied by volts. Then, to convert watts to kilowatt hours, you must divide by 1,000. You were also close with your equation to find kilowatt hours from watts, however instead of multiplying by 1,000, you should divide bye 1,000. Good effort on your blog entry! -Kjersti

Comment 2: You used some very scientific words such as potential, which was a great addition to your blog! You might want to add a few more sentences to your blog, to thoroughly complete the prompt. You should probably look over your definition for what a watt is again, i think you can find that information in your electricity unit notes. You might want to add some more definitions, so the reader will understand what you are saying better. One last thing that i have to say is that you should go back and reread the prompt so you make sure that you get all the information needed to fully complete the assignment. After you go back and look at your blog entry i am sure it will be great! -Jenny

4/22/2008
Go to: [|The Tech Museum: Robotics]. Spend 10 minutes browsing the information and museum. Answer the following blog prompt in complete sentences and in third person. Create a full paragraph. If in the future machines have the ability to reason, be self-aware and have feelings, then what makes a human being a human being, and a robot a robot? Explain. Are there any kind of robots that shouldn't be created? Or that you wouldn't want to see created? Why?

Entry: Robots unlike human beings can not bleed, they can not breath, they do not have creativity, and they can easily be repaired, unlike humans which it takes time for broken bones to grow back. Robots can have spare parts waiting to replace broken parts. Robots age can not be determined by looks, but by how they act and/or what year they were made in. Another difference is that robots do not forget things unless thier hard drive is wiped out, humans can forget things. I would not like to see robots that can have self satisfaction programs, as in in they should be made to serve and not have enough independent thinking where they could go crazy. I do not think robots which are extremly agressive should be made, because if they are, alot more people would be in the hospital. There should not be perfectionist robots who would try to following thier programing by correcting for error and see the human race as being flawed and they would destroy the human race, looking for perfection because the humans are not perfect.

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