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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 !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://

In Russia they are inventing a new weapon to take out enemies, without injuring them. The have used sounds wave guns, radio wave weapons, flashlights, and beanbags to defeat their opponents, however, now the Russians have invented a water cannon that hits with the same impact, but causes less injury. It is almost impossible to break a rib or break a bone with these water cannons. The water from this cannon also spreads out when it makes contact providing a impact that is wider and larger. The Russians decided to use a smaller amount of water, at a higher amount of speed, and this seemed to work. Not to mention it is easy to provide the supplies, because all you need for these water cannons is water and electricity.

This relates to what to have learned in class in the past week, because in order for this projectile to hit the target, it must have the correct time, speed, velocity, and angle to hit the target correctly. If any one of these variables is not correct, the shooter could miss the target. O'Brien, Terrence. "Russians Build the Ultimate Squirt Gun." __Switched__. 2007. Blogsmith. 26 Aug 2007 <[|http://www.switched.com/2007/08/23/russians-build-the-ultimate-squirt-gun/>.] Back to Student Blogs

Comment 1: This blog entry was written in 3rd person, and has two paragraphs, as required. Kjersti has used strong vocabulary, and has used it in the correct way; therefore showing that she understands what she has written.

Comment 2: Kjersti has done an outstanding job summarizing the topic. She also did a great job on explaining how this topic relates to what we have been talking about in class, and how different parts of science effect everything that happens.

great job kjersti!

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//: A Flame test is an experiment that is used when determining the reaction when a chemical compound is in heat. If the wire using to complete this experiment is clean and properly prepared, then the reactions that occurs is that the chemical changes color. This has to do with fireworks because fireworks create different color in the air. This is done by a chemical compound and how it changes color when heat is added to it.


 * "Qualitive Analysis: Chemistry." __Qualtitive Analysis: Flame__ ||
 * || Test. New York Times Company. 17 Oct 2007 . ||

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_ __Sodium and Chlorine Reaction:

entry: When the Sodium is put into the Chlorine, this creates a chemical reaction where the sodium ignites and creates fire. This is a chemical reaction. When the atoms meet, this creates a flame on the sodium. This is an exothermic experiment because it gives off heat when it ignites. The starting product is the sodium block, and the chlorine in the graduated cylinder. The ending result is a burning flame. When the sodium meets with the chlorine, it creates an ionic bond because each sodium atom gives one electron to a chlorine atom. This causes the atoms to release energy. The result of this is a compound that is held together by electrical charges.

//Comment 1:// Kjersti, you did a great job on the overall content of your paragraph. Probably the thing i would fix would be repetitive facts such as "this is a chemical reaction." You have a very good description of what you are talking about. You also have a good order of events. The overall paragraph is easily understandable. Overall i would give you an A+ on this. Great Job. -Jordan B.

//Comment 2: Great job in your overall paragraph. The grammer was great, but there were a few places where you might have wanted to use a comma. Such as the last sentence. The details and explination of the experiment was very well written. You show a great understanding of the bonds, and reactions. Good job on your paragraph, I would give you an A+. -Jen K.

revised entry:// The reaction between Sodium and Chlorine is a chemical reaction. The sodium ignites when it comes in contact with the Chlorine. When the sodium and the chlorine atoms meet, it creates an ionic bond because each sodium atom gives one electron to a chlorine atom. This causes the sodium to release energy and cause the sodium to ignite. The starting product is a gray sodium block, and the chlorine in the graduated cylinder. The ending result is the sodium that is now burning. The result of this experiment is a compound that is held together by electrical charges.__

_ 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?

//Entry:// My favorite project this year was the podcasts, where we mad a rap or a song about an elemet on the periodic table. I liked this because it gave us a chance to use our creativity to write a song, and then use our talent to sing it, as well as our knowledge of the element. I like the snakes in our classroom. Although, i am not a huge fan of snakes, i think that these snakes are nice and friendly and i enjoy having them in our class. I think that i excelled in understand the periodic table and the elements. Next trimester, I am going to try to study more, and make sure i understand everything that we learn in class.

//Comment 1: Kjersti, I feel you have contributed to the class this trimester due to your bubbly attitude and great personality. When you have been in my groups, you have been great. thanks kjersti! -Jordan Commemt 2:

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12/18/2007
Our next unit is about electricity and electronics. In first person write a long paragraph about what you know about electricity and what questions you might like to have answered in our electricity unit. If you could investigate any subject area related to energy in the home, electricity, electronics, computers, etc. what would you like to research or investigate?

Entry: I think that electricity is a wonderful invention. Today, we use electricity in many different ways, and it would be hard to imagine our world without electricity. I have always wondered how electricity works. Like a battery for example, how can such a small thing produce so much electicity for something to use? Whene does electricity come from and how does it get there? Electricity is an amazing thing, and it seems so complicated. Think of how many different things we use in our everyday life that involve electicity. We use refrigerators, microwaves, ovens, wasing machines, drying machines, telephones, computers, televisions, cameras, and many other things. I would like to know how electicity works, since i use electicity so much. I would like to research a cell phone and how it gets service, and how people can call eachother without being connected to a wall outlet.

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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. The electricity source that has increased the greatest amount over time in the graph is coal. In 1950, 0.5 trillion kilowatts per hour were used from coal. However in 2005, almost 2 trillion kilowatts per hour were used from coal. In just 55 years, the kilowatts per hour that were used increased by nearly 1.5 trillion kilowatts per hour. This shows that the use of coal for electricity has increased greatly over the years. 2. The electricity source that contributes most to global warming is the Nuclear electric power plant, that use coal. This is one of the most unnatural productions of electricity. Global Warming has become a big problem in the world today and Nuclear Power Plants are not helping this issue. In 2002 around 40% of the carbon dioxide emissions stem from the burning fossil fuels, that were used for electricity generation in the U.S. 40% is a lot, so this shows that the burning of coal in nuclear power plants, is a big problem for global warming. "Causes of Global Warming." Global Warming: The Causes__. EcoBridge. 4 Jan 2008 <[|http://www.ecobridge.org/content/g_cse.htm>.]

3. From 1972 to 1985, the use of coal for electricity generation increased. The use of petroleum and natural gas decreased. The use of Nuclear electric power increased just a little toward the end of the time period. Hydroelectric power decreased toward the end of the time period. Coal seemed to be the main use for electricity generation in this time period. It looks like they were starting to replace the use of petroleum and natural gas with the use of nuclear power plants.

Comment 1: The paragraph was pretty good, but could probably use some work. Though you wrote in third person and the answer is clear and thought out, there was no reference to the graph. You just came out and said ‘From 1972 to 1985 the use of coal for electricity increased’. Also, there was no data so there was no evidence. It was a good paragraph, but if there was referencing to the graph and data was used, it would be great. –Adam

Comment 2: You did pretty well with writing in scientific writing style. You wrote in third person, and wrote 5 sentences. However, you didn't refer directly to the table, or quote any data directly from the table. In terms of content, you did very well. You followed the blog prompt, but your entry could be improved by restating the prompt so that the reader knows what you are talking about without looking at the prompt. You addressed the question, provided evidence, and drew conclusions that made sense. Overall, a good paragraph that came to great conclusions, but it could be improved by putting in direct data from the graph, and refering directly to the table. -Elizabeth

Comment 2: The paragraph was pretty good, but could probably use some work. You did a good job writing as scientist. Though you wrote in third person and the answer is clear and thought out, there was no reference to the graph. You just came out and said ‘From 1972 to 1985 the use of coal for electricity increased’. Also, there was no data so there was no evidence. It was a good paragraph, but if there was referencing to the graph and data was used, it would be great. Good job over all. :)

~ Jason revised entry: In 2000, the graph shows that coal was the most used source of electricity. Coal stays at the top of the graph with around 2.2 trillion kilowatt-hours during the time period of 2000-2005. Nuclear electric power and Petroleum gas were used about the same in the time period 2000-2005. Hydroelectric power was used the least in 2000-2005 with 0.2 trillion kilowatt-hours. Coal was obviously the most significant in 2000-2005 with about 2 trillion kilowatt-hours more than hydroelectric power. In graph one it also shows that petroleum and natural gas are probably going to increase in the future because it is headed up towards the end of the graph in 2005.

comment 1: Kjersti, this was a fabulous blog entry! However, there is some slang used that could be easily corrected. For example, it says near the end of the last sentence, "it is headed up towards the end of the graph". There are also some other sentences like this that could be easily fixed. Another thing you probably want to fix is that certain sentences seem like they are missing a word or two. You should try reading it out loud to see if you need to add anything into it. Kjersti, this was an amazing blog entry overall. Keep up the good work! - Bailey

//revised and final entryt:// In 2000, the graph shows that coal was the most used source of electricity. Coal continues to be used more than other electricity sources with around 2.2 trillion kilowatt-hours during the time period of 2000-2005. Hydroelectric power was used the least in 2000-2005 with about 2 trillion kilowatt-hours more than hydroelectric power. Graph one also shows that the petroleum and natural fas are most likely going to increase in the near due to the fact that it has already started to increase between the year 2000 and 2005 WHERE IS THE DATA FOR THIS? OVERALL CONCLUDING SENTENCE STATING THE TRENDS. KEEP WORKING ON YOUR SW.- JT__

__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:__ Watts is a mesaurement of power. To calculate a watt, you must multiply current and volts to find watts. So, if there was a lamp that used a 200 watt light bulb, and it was burning for 24 hours, to find the kilowatt hours you must first mulitply watts and hours, so 200 times 24. Then, you take the outcome of that equation which is 4800, and you divide that by 1000 becuase you must convert from watts to kilowatt hours. 4800/1000 is 4.8. Therefore, there should be 4.8 kilowatt hours used in a lamp with a 200 watt light bulb that was left on for 24 hours.

__Comment 1:__ Great job Kjersti! You forgot to write Ohm's law for this. **USE CAPITALIZATION!!** Over all very good. ~ JCF

__Comment 2:__ Awesome entry! One thing that i found in your entry, though, was that you wrote in 1st person view instead of the required 3rd person view. I have to disagree with Jason's comment about using no capitalization, because you always started your sentences with capitals. There were some grammar problems, like mesaurement and mulitply, but otherwise, great work!!! Griffin

2/28/2008
This trimester we started by finishing up our chemistry unit by doing an acid/base experiment. After this, we started our electricity/electronics unit in which we first made basic series and parallel circuits with buzzers, speakers, motors, and lights. We applied ohm's law to these experiments. Following this, we started working on the Radioshack Electronics Kits where we made complex circuits that had a variety of functions- blinking LEDs, screeching speakers, analog to digital converters, etc. The technology we used this trimester included the pH probes that we connected to our computers to get the pH of household chemicals, using the wiki to create an class test review sheet, the Radioshack Electronic Kits, and creating collaborative lab reports in the wiki for our electronics unit (instead of a formal lab report).

//__In this blog prompt, please write a paragraph long entry (5-6 sentences with a intro and concluding sentence) that addresses what you enjoyed during this trimester and what you have learned. You can also comment on what you would like to improve upon for next trimester or what was difficult for you. Feel free to comment on our snakes- Peppermint and Diablo if you would like to as well as the technology that you enjoyed this trimester. Please check your spelling and grammar as this blog entry may appear in your end of trimester comment. You may want to write it in Microsoft Word to check the spelling, etc. and then copy it in the blog.__//

Entry: This trimester in Science, I have learned a lot about acids and bases, and electricity. I have also done many activities and experiments. In the beginning of the trimester, we learned about acids and bases. We did an experiment, where we took everyday house hold items such as dishwashing soap, shampoo, soda, water, milk etc. and we used Ph papers to determine whether each liquid was more acidic, or more basic. After the acids and bases experiment was concluded, we began our electricity unit. In our electricity unit, we learned about voltage, resistance, current, kilowatt-hours, circuits, and much more. We made many parallel and series circuits using light bulbs, LED's, speakers, buzzers, motors, batteries, and wires. Finally, to conclude our electricity unit, we used breadboards to construct very complicated circuits. We made the LED flasher, the 555 circuit, and the 4049 inverter circuit. These circuits included integrated circuits, resistors, capacitors, LED's, and many wires. I also enjoyed meeting the snakes; Peppermint and Diablo, and it was fun to choose names for them. I have had a lot of fun this trimester in Science class. To improve next trimester I will work to understand everything we learn, and I will work to get an A as a final grade in this class. I enjoyed the activities and experiments that we did, and I am looking forward to next trimester, which I'm sure will be full of educational fun!

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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: I think that there are still many differences between robots and humans. Even if the robots are made to have thoughts, and feelings, humans are very different than many other species, and nothing can change that. Humans have many feelings and emotions, they also have feelings for other people. Humans grow and develop over the years. Humans also have a lifestyle, that no other species have. I believe that even if robots were made to have the qualities like a humans, the robot will still be very different and will not experience the same lifestyle. I do not think that robots should be created to act and feel just humans. I don't think that it is necessary to recreate the human species with technology. Robots are created to help people will everyday life, or tasks that a human cannot easily do. Robots are created to help humans, not to be humans. We do not need to replace our species with technology. I think that robots are a great idea, if they are used in a way that people will benefit.

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