This week we concluded that salminila caused the outbreak at Jefferson and Truman. Salminila fit in every way. It had the same symptoms. It is Gram negitive like our grams test said. Lastly it is a bacteria common in chicken which we had deduced was where the outbreak was coming from. Our lab reports were supposed to explain the prosseses we went through to reach our final decicion.
Now we wanted to know, what is a cell? What are they made of, what do they do, what do they look like? We conducted a test to look at our cheek cells. One slide was made with water and cells, another was made with cells and methaline blue. The methaline blue made the cells more visable under microscope. We saw all of the cells have a dot in the center called a nucleus. We could also just make out other things in the cell. The cells, even for tiny things are very complex. This was proven through homework where we had to draw a labled diagram of animal and plant cells. They are different, but relativly the same. Some things like the vacuole are only in the plant cell and visa versa.
What do plant cells look like under a microscope? We cut a potato into see through slices, then we could see the cells within under a microscope. We used two dies this time. Lugal solution and Methaline blue. Each showed different parts of the cells better. I believe the metaline blue shows the nucleus and lugal shows the other organelles. We also looked at grass which was amazing to look at. Each cell was like a brick and they all fit together in perfect rows. It was like a wall. I couldn't see the different parts of the cell like in the potatos. I think that is because the grass has color and is not clear like the potato cells.
On Friday we played a game to test our knowlage of plant and animal cells. We took a long time with the plant cell and went very quickly on the animal cell. Many of the parts with simaler names and places got very mixed up. The whole week turned out to be a test devised by Mr. Finley to learn if something he learned at a teachers meeting was true, and it was.
Saturday, October 31, 2009
Saturday, October 24, 2009
10/19 Science
I was only in school for one day this week. In that day we discussed the things in the pond. I shared that the small crustations everyone saw were water fleas. There was also alge in the water that we could see. Nothing we could see was visable. Almost all bacterias and viruses are not visible under a microscope. We said there could still be bacteria in the water.
Next we came up with four possible bacteria for the chicken. Salmonella, staphylococcus aureus, campylobacter, and listeria monocytogenes are all found with chicken.
-Staphylococcus causes pimmples, boils, and impatego. It also causes more life threatening viruses like meningitis and pneumonia. None of these diseases relate to the symptoms the infected people described.
-Salmonella is found in eggs. It is one of the most common foodborn diseases. People expirience fever, diarrhea, abdomanal cramps, chills, nausea, and vomiting. Salmonella has all of the symptoms the middle schoolers had. This is the website I found to learn about salmonella. http://www.fsis.usda.gov/factsheets/salmonella_questions_&_answers/index.asp
-Campylobacter is one of the main cause of bacterial foodborn diseases. It causes tissue damage in the colon. None of the people absent had colon damage.
-Listeria Monocytogenes causes muscle aches, fever, and sometimes nausea and diarrhea. It can cause Menintgitis. It doesn't match at all. The disease only appears in newborns, old people, and pregnant women.
Salmonella is the one the fits the discription most. The chicken could have had a lot on it and the kids ate it.
Next we came up with four possible bacteria for the chicken. Salmonella, staphylococcus aureus, campylobacter, and listeria monocytogenes are all found with chicken.
-Staphylococcus causes pimmples, boils, and impatego. It also causes more life threatening viruses like meningitis and pneumonia. None of these diseases relate to the symptoms the infected people described.
-Salmonella is found in eggs. It is one of the most common foodborn diseases. People expirience fever, diarrhea, abdomanal cramps, chills, nausea, and vomiting. Salmonella has all of the symptoms the middle schoolers had. This is the website I found to learn about salmonella. http://www.fsis.usda.gov/factsheets/salmonella_questions_&_answers/index.asp
-Campylobacter is one of the main cause of bacterial foodborn diseases. It causes tissue damage in the colon. None of the people absent had colon damage.
-Listeria Monocytogenes causes muscle aches, fever, and sometimes nausea and diarrhea. It can cause Menintgitis. It doesn't match at all. The disease only appears in newborns, old people, and pregnant women.
Salmonella is the one the fits the discription most. The chicken could have had a lot on it and the kids ate it.
Sunday, October 18, 2009
Science October 18
This week we finally tested for organisms in the pond water, in the chicken, on the knife, on the pan, and in or on the bread samples.We had to have one microsope test and test at least two things in a petri dish. Before we were allowed to use the microscopes we had to take three quizes.
Monday: I was not there on Monday because of a doctors appointment. When I got to class in the last five minutes the rest of my group was doing a reviw sheet. We did not get much done.
Tuesday: On tuesday we made our petri dish and took the written parts quiz. We first divided the petri dish into fourths and labled them. One was chicken surface and another was top of bread. The other two were knife handle and pond water. The parts quiz was difficult, it took a while but I remembered all but one part, the Body Tube. The day helped me learn to write my procedures as specific as posible.
Wednesday: We observed our petri dish from yesterday. My prediction was that the chicken and knife would have the same amount and that the pond water would have the most bacteria also. I was wrong on both acounts. The chicken ended up having it's whole quarter filled with yellow bactiria. The water had a lot, just not as much. The knife had only 10 small colonies and the bread had none. After everything was recorded, we took the oaral parts and functions quiz.
Thursday: We observed our petri dish one more time. The chicken looked the same, maybe a little bigger. The pond water had more colonies than the day before and they were bigger. The colonies on the knife had gotten bigger. Three that had been close the day before has fused because they grew. The top to the bread still had no bacteria. Then we took the slide making quiz. After that we were free to use the microscopes. We wrote down our procedures, got them approved and spent ten minutes on a microscope looking at pond water. We did not make any pictures on thursday which was a mistake.
Friday: We spent the whole class looking at the pond water through a microscope. We found a very fast organism that looked like a shrimp. It had two eyes, a tail to move with, feelers coming from a mouth of some sort, and multiple legs from its abdomen. It did not look like its eyes were very good because it kept hitting plant life. I looked it up and it is a form of crustation. It is a water flea. The type of water flea I, was unable to determine.
Now my group just needs to get the blood results and make our lab reports.
Monday: I was not there on Monday because of a doctors appointment. When I got to class in the last five minutes the rest of my group was doing a reviw sheet. We did not get much done.
Tuesday: On tuesday we made our petri dish and took the written parts quiz. We first divided the petri dish into fourths and labled them. One was chicken surface and another was top of bread. The other two were knife handle and pond water. The parts quiz was difficult, it took a while but I remembered all but one part, the Body Tube. The day helped me learn to write my procedures as specific as posible.
Wednesday: We observed our petri dish from yesterday. My prediction was that the chicken and knife would have the same amount and that the pond water would have the most bacteria also. I was wrong on both acounts. The chicken ended up having it's whole quarter filled with yellow bactiria. The water had a lot, just not as much. The knife had only 10 small colonies and the bread had none. After everything was recorded, we took the oaral parts and functions quiz.
Thursday: We observed our petri dish one more time. The chicken looked the same, maybe a little bigger. The pond water had more colonies than the day before and they were bigger. The colonies on the knife had gotten bigger. Three that had been close the day before has fused because they grew. The top to the bread still had no bacteria. Then we took the slide making quiz. After that we were free to use the microscopes. We wrote down our procedures, got them approved and spent ten minutes on a microscope looking at pond water. We did not make any pictures on thursday which was a mistake.
Friday: We spent the whole class looking at the pond water through a microscope. We found a very fast organism that looked like a shrimp. It had two eyes, a tail to move with, feelers coming from a mouth of some sort, and multiple legs from its abdomen. It did not look like its eyes were very good because it kept hitting plant life. I looked it up and it is a form of crustation. It is a water flea. The type of water flea I, was unable to determine.
Now my group just needs to get the blood results and make our lab reports.
Thursday, October 8, 2009
Science 10/8
We got the results of our petri dishes on Monday. They were discusting. Yellow bactiria colonies growing on the glass. The weird thing was that we were supposed to choose something that would have lots of bactiria in the bathroom and something that has none. Our results got flip flopped. Our control clean sample was an empire while the supposed to be dirty one was almost empty. Our mistake was thet we choose the drain as the control. All of the bactiria in the sink goes to the drain. I learned many things about bactira through the experimet such as it spreads everywhere and fast.
Later in the week we were discussing viruses. We wanted to know if they were living. I learned about one type of virus that has a capsid, nuclic acid, tails, a sheath, and a rod. When We confirmed that they are not living because it is not composed of cells. I said it could posibly be single celled, but I was wrong. There is no cell wall, capsule, or DNA in a virus to name a few. They have RNA which stands for Ribonuclic Acid. That made me think it sounds like ribosomes. So maybe viruses are living.
We started talking about what fats and oils are used for. I had thought they were stored energy. Turns out it is used by viruses to not fusing with water based liquids. Here is a video of an experiment I did.
We are finally going to start doing experiments to learn what the epademic at Truman Middle School is. I think a good way to test everything would be to have a petri dish with water sample, equiptment sample, and food sample. Then the next day while the bactiria grows take the microscope test. The next day having passed the test I could make a slide for each of the three samples and examint them through the microscope. On thursday I could examine the petri dish I made on Monday. On Friday I could get the results of the blood and work on my Lab Report.
Later in the week we were discussing viruses. We wanted to know if they were living. I learned about one type of virus that has a capsid, nuclic acid, tails, a sheath, and a rod. When We confirmed that they are not living because it is not composed of cells. I said it could posibly be single celled, but I was wrong. There is no cell wall, capsule, or DNA in a virus to name a few. They have RNA which stands for Ribonuclic Acid. That made me think it sounds like ribosomes. So maybe viruses are living.
We started talking about what fats and oils are used for. I had thought they were stored energy. Turns out it is used by viruses to not fusing with water based liquids. Here is a video of an experiment I did.
We are finally going to start doing experiments to learn what the epademic at Truman Middle School is. I think a good way to test everything would be to have a petri dish with water sample, equiptment sample, and food sample. Then the next day while the bactiria grows take the microscope test. The next day having passed the test I could make a slide for each of the three samples and examint them through the microscope. On thursday I could examine the petri dish I made on Monday. On Friday I could get the results of the blood and work on my Lab Report.
Saturday, October 3, 2009
Science 10/3
In science we continued our work with disseases. We had Monday off so we did not have much time for work this week. We looked at new data on the Truman and Jackson Middle School outbreak. We looked at the symptoms each student had. All of them had to do with food, such as vomiting, stomach aches, and diarrhea. Many students claimed food poisining and that it is worse the next day. That tells me the outbreak sets in slowly. Also, almost all of the students who were sick went to the same restrant and went swimming.
To test all of our data we are having water samples, blood samples, and food samples sent to us. We could use petri dishes to see what bactiria is on each sample. We practiced this by checking a bathroom for bactiria. Take a cotton swab ( steralized) and RUB it GENTLY on a surface. Then quickly Rub that same side inside the petri dish, on one side, in a z pattern. If you then leave it in a warm place upside down for a few days, bactiria will grow. We have not gotten the results of our bathroom test yet though.
On wednesday I don't think me or the rest of the class understood how small viruses are. Mr. Finley gave us this site tat slowly shows how small things are. First there was a needle with a hair on it. Then it zoomed and you d see dust mites on the head of the needle. Then it zoomed more on the needle head to show red blood cells, pollen and yeast. Then more to show E. coli, zoom, and it showed still on the needle a rhinovirus. This opened many questions and taught me many things. I had never known that virused were smaller than rad blood cells, I had thought the were the same size.
In class we discussed what things in the video were Macroscopic, Microscopic, and Sub-Microscopic. We had to firth decide what each word means. Macroscopic is too big for a microscope. We decides the hair was Macroscopic. Sub-Microscopic things are too small for a regulas microscope. Bactiria and viruses are in this catagory. So we had to think of a new way to see the outbreak. That is why we are using the test from paragrah 2. Everything we did this week helps us identafy the outbreak at Truman and Jackson.
To test all of our data we are having water samples, blood samples, and food samples sent to us. We could use petri dishes to see what bactiria is on each sample. We practiced this by checking a bathroom for bactiria. Take a cotton swab ( steralized) and RUB it GENTLY on a surface. Then quickly Rub that same side inside the petri dish, on one side, in a z pattern. If you then leave it in a warm place upside down for a few days, bactiria will grow. We have not gotten the results of our bathroom test yet though.
On wednesday I don't think me or the rest of the class understood how small viruses are. Mr. Finley gave us this site tat slowly shows how small things are. First there was a needle with a hair on it. Then it zoomed and you d see dust mites on the head of the needle. Then it zoomed more on the needle head to show red blood cells, pollen and yeast. Then more to show E. coli, zoom, and it showed still on the needle a rhinovirus. This opened many questions and taught me many things. I had never known that virused were smaller than rad blood cells, I had thought the were the same size.
In class we discussed what things in the video were Macroscopic, Microscopic, and Sub-Microscopic. We had to firth decide what each word means. Macroscopic is too big for a microscope. We decides the hair was Macroscopic. Sub-Microscopic things are too small for a regulas microscope. Bactiria and viruses are in this catagory. So we had to think of a new way to see the outbreak. That is why we are using the test from paragrah 2. Everything we did this week helps us identafy the outbreak at Truman and Jackson.
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