Class Response- Cork Popping Experiment

*Note: This picture shows the reaction between baking soda and vinegar in an uncorked test tube. In our experiment, the test tube was corked.

As you can imagine, class was quite interesting when our teacher announced that our experiment was to shoot a cork across the classroom. The method was actually quite simple- we had to find the correct ratio of baking soda to vinegar to make the cork hit the window on the other side of the classroom, which was 675 cm away. The combination of baking soda and vinegar causes a chemical reaction, creating carbon dioxide, or CO2. The CO2 then expands, creating pressure behind the cork. This is what causes the cork to pop out of the test tube.

1. In our first attempt, we used 10 mL of baking soda, and 15 mL of vinegar. We first added the baking soda to the test tube. Once we were on the firing range, we added the vinegar. The cork went 605 cm out of the total 675 cm.


2. My lab partners and I decided to increase the quantities of both the baking soda and vinegar for our second attempt. When we were on the firing range, the test tube was pointed too low. As a result, the vinegar spilled directly onto the floor, only a little bit getting into the test tube. The cork only popped 40 cm.


3. Since we made a silly mistake on our second attempt, we decided to try the same thing again. This time, our cork popped 655 cm out of the total 675 cm.


4. We decided to increase the amount of baking soda to 20 mL, and decrease the amount of vinegar to 10 mL. This time, the cork popped 589 cm, 156 cm less than the time before.


5. This time, we decided to add the vinegar first, as in our tries 1-4 we had added baking soda first. When the baking soda was added, there was not much initial reaction. Because of this, my lab partner, who was holding the test tube, shook it. Unfortunately, he shook it vertically. The cork shot up, hit the ceiling, and fell behind us.


6. We decided to try the same method as Trial 5. The cork went 401 cm before falling down. My lab partners and I agreed that adding baking soda first doesn't work as well.


7. For our 7th try, we decided to use equal amounts of baking soda and vinegar, using 15 mL of both. We also went back to adding the baking soda before the vinegar. This proved to be our best method so far- it went the full 675 cm, hitting the vent at the back of the class. However, we did not hit the window.


8. We decided to use the same method again, but aim more toward the window. The cork went 675 cm again, hitting the windowsill, but again, not the window.


9. Our group decided to increase both the quantities of baking soda and vinegar to 20 mL. This time, the cork hit the last tile, so again, it went 675 cm.


10. Once again, we tried the same thing, and got the same result. We kept getting so close to hitting the window, but that's all we got- close.


11. For our 11th attempt, we used 10 mL of baking soda, and 20 mL of vinegar. This time, the cork popped out, hit the light, and fell, at 510 cm.


12. We used the same method as above, and got the result that we had been getting-the cork went 675 cm, and hit the vent at the back of the class.


13. Our 13th try was our last. We decided to try the same thing as our 12th try, hoping that our problem was with our angle. We tried it again, and got the same result.

Overall, I thoroughly enjoyed this experiment. Though our group's cork never hit the window, we had fun trying to figure out how to get the result we want. I think that out of all the experiments we've done so far, this was my favorite.

Meteor Shower- October 2009

Just for the record, the image above is not of the Orionids Meteor Shower, it is a picture of the Perseids Meteor Shower. I could not find a clear picture of the Orionids Meteor Shower, and this is why I am using the Perseids Meteor Shower to substitute.

As you may know, the Orionids Meteor Shower was visible in our sky starting on October 2. This meteor shower occurs every October. Halley's Comet, which causes the Orionids Meteor Shower, also produces another meteor shower in May called Eta Aquarids.

Before I go into any more detail about the Orionids Meteor Shower specifically, I should probably give a little bit of information about meteor showers themselves. A meteor is a streak of light in the sky. They occur when a meteoroid, which is a solid moving object in space and often come from a comet (as in the case of the Orionids) , enters the atmosphere. These, when they are in clusters, are called meteor showers.

The Orionids Meteor Shower gets its name, like many other meteor showers, from a constellation it seems to radiate from. In this case, this constellation is Orion. This meteor shower will be visible from October 2 until November 7. The strongest activity supposedly took place this morning, October 21, during the predawn hours. The Orionids always seems to show what is called "submaxima activity" from October 18 until October 24. This means that sudden outbursts may occur at any time. Like I said before, the Orionids Meteor Shower is only in the sky until November 7, so if you are interested, look up and towards the constellation Orion while it is dark outside, and see what you can see!

Sources:

MeteorBlog.com: www.meteorblog.com

Wikipedia.com: en.wikipedia.org/wiki/Meteor#Meteor

Blue Eyes

Scientists have known for a while that blue eyes were caused by a genetic mutation about 10,000 years ago. Just recently, they found the mutated gene, called the OCA2 gene. This gene, located in the chromosomes, controls melanin production in the iris, which gives your eyes their color. Brown eyes contain a lot of melanin, while blue eyes contain little. Depending on the amout of melanin, eyes can be any color from brown to green. Originally, all people had brown eyes. Scientists say that all blye-eyed people have exactly the same DNA sequence, linking them all to one common ancestor. All blue-eyed people inherited the genetic switch in the same spot of DNA. The genetic switch somehow spread throughout Europe, and now other parts of the world.

I found this article interesting, being blue-eyed myself. I also found it interesting because I have ancestors from Denmark, one of the countires this study was conducted in. My question is, how did this mutation take place?


One Common Ancestor Behind Blue Eyes LiveScience
http://www.livescience.com/health/080131-blue-eyes.html

Plasticity Lab

In science class, we did a lab to demonstrate the plasticity of Earth's mantle. To do this, we used cornstarch and water, and combined them in a large beaker. The result- though very hard to stir- was extremely interesting. This mixture created a substance that went between liquid and solid. It seemed to melt when you did not handle it, but when you touched it again it was solid. Because it went between being liquid and solid very rapidly, I think it was both.

As I stated before, this lab was to demonstrate the plasticity of Earth's mantle. The mixture that we created was similar to the mantle because it reacts the same way that scientists have found that the mantle does. It has the same texture as well. Both substances are solid, yet behave like a liquid, and also behave somewhat like plastic.

I enjoyed this lab a lot. I want to try this again at home, because the mixture that we created was so interesting and fun to play with!

Source:
Wikipedia.org

October Sky Blog

In school we watched a fascinating movie called "October Sky". It was about four teenage boys who decide to try to build a rocket after being inspired by the Russian sattelite, Sputnik. But the boys face a problem- they are growing up in a mining town in which you were expected to only finish high school, then go to work in the mines. Though the main character, Homer Hickam, faced many failed attempts, as well as an unsupportive father, he eventually succeeded in building a rocket, won the national science fair, and got a scholarship to college.

"October Sky" can be connected to science, math and character education because Homer used science to both build his rocket, and make it fly. The Russian sattelite Sputnik is also relevent in the same ways as rockets. In addition, the health hazards that the miners faced are also valid connections, because the human body and health are also part of science.

Math was used in figuring out how to get it off the ground, how fast it would go, how high it would go, and where it would eventually land. Adding to this, Homer proved that the boys's rocket did not start the forest fire by figuring out how high it would go, and how far it had traveled. Homer had calculated the exact spot that the rocket would have landed- and found it right there.

The character traits Homer and the "Rocket Boys", as they were called, displayed can be connected to CARES. For example, the boys worked together to build the rocket, showing cooperation. Homer used assertion when talking to his father about continuing to try to build his rockets, though showing respect for his wishes. This would show both assertion and respect. Empathy was shown when Homer's father told the son of a man who was killed in the mines what a great man his father was, and how terrible it was that the accident that had killed him occurred. Throughout the movie, Homer showed self-control by not physically hurting his father, no matter how rude and uncaring Mr. Hickam was to his son.

I enjoyed the movie "October Sky" very much, and I think that all the science and math connections, as well as connections to character education, are very relevent to our curriculum.

Response to: Sickle Cell Anemia

Sickle Cell Anemia, a genetic disorder that affects bone marrow, seems to be an interesting disease. I feel bad for the people with Sickle Cell Anemia, because it can be a lifelong disease if the Sickle Cells reproduce. According to softballgirl96, it affects many people worldwide. I hope that a cure is found soon, though a rather risky one is bone marrow transplant. It seems that many genes that cause genetic disorders are mutated, rather than being absent or having extra copies. In my opinion, the sooner a cure is found, the better. I would like to learn more about Sickle Cell Anemia.

Source:
softballgirl96

Cystic Fibrosis

Cystic Fibrosis is a genetic disorder that affects mostly the lungs, but also the skin and bowels. The symptoms and possible complications of people with this disorder are:

• very salty-tasting skin

• persistent coughing, at times with phlegm

• frequent lung infections

• wheezing or shortness of breath

• poor growth or weight gain in spite of a good appetite

• frequent greasy, bulky stools or difficulty in bowel movement

30,000 people in the United States have Cystic Fibrosis, and 70,00 people worldwide. Children and adolescents are most vulnerable to the disease. People that had cystic fibrosis used to die young, but now, with new treatments, they live into their 30's, 40's, and beyond, though the median age is 37.

At the molecular level, there is a mutated gene. For example, genes G542X, G551D, N1303K, W1282X, and ΔF508. The gene mutation ΔF508, the most common mutation involved in Cystic Fibrosis, is a deletion of three nucleotides.

Though there is no known cure for Cystic Fibrosis, a good nutrition and active lifestyle can help. Knowing this, I am sympathetic to people with Cystic Fibrosis. With the median mortality being 37 years old, that does not seem like a very long- or comfortable- lifetime. I hope that in the future, there is a cure for this dreadful genetic disorder.

Source:
Wikipedia.org

Social Studies Blog

This week, New Jersey Senate committee approved a bill to decrease taxes in small buisnesses. The bill, as stated by an online article on www.nj.com, "was an element of the economic stimulus package proposed in October by Gov. Jon Corzine". Simply put, it was based on an idea that Governor Jon Corzine stated in October. This gives the state of New Jersey more money for other causes that the government feels is important. The vote was unanimous, all fourteen representitives for New Jersey voting for this bill. This may help small buisnesses not go out of buisness, also helping the economy. I think this was a good decision, and more small buisnesses will probably succeed because of this new law.

"Senate committee approves bill to spur loans to small businesses, individuals"

http://www.nj.com/news/index.ssf/2009/02/senate_approves_push_for_econo.html

My Roller Coaster

Sachmokido

Roller Coaster Project

In science, we are making roller coasters out of paper towel tubes, milk cartons, and other common items. The requirements of the roller coaster are:

-it has to have at least three hills

-it has to have at least one other roller coaster feature

-it must be completed in the time given

-you must buy all materials using "Omega Money" that you earn from teachers

Our group's roller coaster, which we have decided to name "Sachmokido" for the two first letters of everyone's name in our group, unfortunately does not meet requirements. Though Sachmokido does not meet requirements, my group and I had fun assembling it. While this assignment was a lot of fun, it also related to Newton's laws. For example, the marble does not move until it is dropped into the start of our roller coaster, as stated in Newton's First law of motion. Newton's Second law is demonstrated by the marble picking up more speed at some points, and slowing down slightly at others. Our roller coaster relates to Newton's Third law because when the marble hits the tape we put at the end to stop it, we then tilt the roller coaster the opposite way, making the marble go in the opposite direction it was going before it hit the tape. I think this was a very fun and very educational assignment, and my group and I enjoyed it a lot. If only all assignments were this much fun...

LCD televisions vs. the enviroment

Yes, your LCD television is destroying the world around you. But the real question is, how? One reason is that producing plasma screen televisions releases a greenhouse gas called nitrogen trifluoride, which is about 17, 000 times more destructive than carbon dioxide. It is even more of a concern because the levels of this gas have not been measured, and it is not known wheather it is "captured on sight or broken down before release into the atmosphere". Nitrogen trifluoride is not covered by the Kyoto protocol, an enviromental treaty that was established at a United Nations conference. This is because in 1997, when the treaty was signed, nitrogen trifluoride was only produced in small amounts, because LCD televisions were not popular yet. As their populariy grew, and more needed to be manufactured, more harmful gasses were released into the air. It is estimated that 4,000 tons of nitrogen trifluoride was produced in 2008, and it is likely to double in 2009. What a cheerful way to kick off the new year!

In my opinion, nitrogen trifluoride should be included in a future treaty like the Kyoto protocol. If this is not put into effect, the enviroment will become even more damaged, and some animal species may become extinct.

Article by Yahoo! Green http://green.yahoo.com/blog/ecogeek/624/are-lcd-tvs-worse-than-coal-plants.html