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December 18, 2007 | 5:47 AM |
Dr. Claire Hemingway
Thanks and Happy Holidays Thanks and Happy Holidays Well, Team, with the holiday break approaching, I'd like to thank you for sharing your research with Dr. Sundberg and the entire PlantingScience community. It's sure been fun to follow your collaboration with Dr. Sundberg on your investigation. We hope you are going away with some new insights about how science works, and confidence that you can easily take on new challenges of doing it and making sense of it. There are a lot of fascinating research questions---just waiting for young investigators to join in the fun. Perhaps we'll see you again sometime soon. All best wishes for holidays and the remainder of your school year. Dr. Sundberg, thank you for taking the time to mentor JERM. Claire Hemingway |
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December 7, 2007 | 4:02 AM |
Dr. Marshall D. Sundberg
(Scientist/Mentor)
Hi JEMRS You had a really interesting experiment (and I like your little side experiment at the end to investigate phenol red!) and pretty conclusive results. Those roots really are going to town, in both the corn and radish. I have one suggestion for the future when you're plotting your data. Put time (0, 5, 10, 15 min) on the x-axis and your readings as they are on the y-axis (these are actual pipette readings rather than volume of oxygen used aren't they?). Then your series will be stem, root and leaf (or control), and the graph will show you the rate of oxygen used in ml/min (sort of like miles/hr shows you the rate of a car moving down the highway). All-in-all, GREAT JOB. Have a happy holiday season. Dr. S |
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December 7, 2007 | 3:02 AM |
predeker
(Student, Team 8 - ESU_F07_008 · 3)
Hey, Following up on Megans response I know that we here at Emporia State University are displaying R^2 values on our graphs as well as the equation of the trendlines. This allows for people viewing your results to accurately view your results and see exactly how close you are! Keep up the good work! Parker |
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November 29, 2007 | 12:26 AM |
Meg
(Student, the fireflies - YHS_S10_R10 · 4)
Hi, Your findings are very interesting. I wouldn't have exspected the roots to use the most oxygen. Good job! On your spread sheet, since you weren't able to acquire data for the leaf on corn you do not need to include the radish leaf data into your graph for the radishes. It is still good to keep it recorded that you took that data, but not necessary to graph. I would suggest that you set a trendline for each series in your graph and display the R^2 value and equation of the line. With an R^2 value it allows you to see how accurate your data is. The closer your R^2 value is to 1.0 the more accurate your data is. You would also need to label your "x" axis and "y" axis, and a title for your graphs. Other than that congratulations on completeing your experiment, and your findings! |
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November 29, 2007 | 12:15 AM |
alebien
(Student, Coloring with Coleus - ESU_F07_002 · 3)
Hey JERMS, your research question is definitely interesting! Your procedures are detailed, but I think it may be helpful if you elaborate on your research conclusions. I was wondering what difference you saw between the corn and the radish plants, or if there was any significant difference in the results from the two different plants? Good work though! Alison |
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November 29, 2007 | 12:15 AM |
Kim
(Student, Polka Dotted Pickles - MMS_S10_W10 · -1)
Graphs of Data Is there any way you can redo your graphs so they are less confusing? I am having trouble seeing the difference between each set of data. |
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November 29, 2007 | 12:12 AM |
Kim
(Student, Polka Dotted Pickles - MMS_S10_W10 · -1)
I noticed that you collected data for both Corn and Radish plants. Was the data between the two different? What was the purpose of using two different plants? Also, in your conclusion you should state whether you can accept or reject your hypothesis. |
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November 25, 2007 | 11:26 PM |
madison_2011yoe
(Team Member)
Megan Thankyou for your comment. It will help very much. Thankyou for telling us how we should do our hypothesis. We have never done them like this. Our teacher last year told us to do them like " I Think the stem will require more oxygen than the stem or roots," so we are still getting the hang of this. We ran out of time to finish our experiment but we finished our other ones. Thankyou!!! |
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November 25, 2007 | 11:24 PM |
John
(Team Member)
we arn't doing a leaf trial we could not get a leaf trial on the radishis so we had to cancle that part of our research so there will be some corrections on our experiment. |
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November 25, 2007 | 11:22 PM |
John
(Team Member)
1) yes all pipettes were inserted the same way 2) yes we covered all the tubes with foil 3) once we had all the materials needed in the test tubes we put the phenol red in the pipettes, then let it sit for 2min and after that we recored every 5min. is that enough or do you need more? |
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November 25, 2007 | 11:22 PM |
madison
(Team Member)
KIM Thankyou for your comment. We are going to do several trials so that we know if we mad a mistake or not. We are also going to so we can see the variations between trials and the items. |
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November 19, 2007 | 6:38 AM |
Megan
(Student, the fireflies - YHS_S10_R10 · 4)
From what I've read it appears that you have gotten off to a good start. Although when writing out your procedure, experimental designs, research predictions, etc. write them as if you aren't answering a question. For example, under research predicitons you could say something to the extent that our hypothesis is that the "stem will require more oxygen than that of the leaves or roots." Also include what your null hypothesis would be. One other thing, make sure to proof read what you write before you post it, there are some miner errors that make things somewhat confusing to the reader. I also think it would be a good idea to complete multiple test runs of each part of the plant, to improve the accuracy of your findings. The best of luck to you and I look forward to your results! |
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November 19, 2007 | 12:12 AM |
Kim
(Student, Polka Dotted Pickles - MMS_S10_W10 · -1)
It sounds like you have a good start on your research project. I was just wondering if you were going to do multiple trials of each plant section? It might be a good idea so that you can take averages and do a t-test to see if the respiration of the separate parts are actually different. |
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November 16, 2007 | 12:58 AM |
Dr. Marshall D. Sundberg
(Scientist/Mentor)
a little more clarification Thanks for the clarification, John. Now I have a few more questions: 1. Were all the pipettes inserted the same way 2. were all the tubes covered with foil 3. how long did you let the tubes sit with the soaked KOH q-tips before you actually pulled phenol red into the tubes to close the system and start your measurements? Dr. S |
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November 15, 2007 | 11:25 PM |
yoemanj
(Team Member)
The data was from the lab is from when we covered the test tubes in foil. We already talked to our teacher about that, the only way we could get the pipettte to get the tube air tight is to put the point out. We learned how to read the pipette to where the oxygen is decreasing. There realy are many more questions, but with questions we will get this lab working. John |
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November 15, 2007 | 11:22 PM |
madison
(Team Member)
Dr. Marshall D. Sunberg Dear Dr. Marshall D. Sunberg Thankyou so much for telling us this information. We will be sure that we look over our data again. We are also going to anot her trial so we can change a few things if needed. I am glad that you thought the foil was a good idea. It is a little confusing about our data and things. I think it is partly that we dont totally know what we are doing. So this is a great learning process for our group. |
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November 15, 2007 | 6:35 AM |
Dr. Marshall D. Sundberg
(Scientist/Mentor)
Foil This is a good idea and easy to do. It will make sure that photosynthesis will not be occurring at the same time as respiration in any tubes with plants having green tissue. Now I have a question about your radish data. The table it titled "oxygen used" and the numbers go up gradually for stems, but go down for roots. If oxygen is being used up by the plant tissue in your tubes, the volume of gas should be decreasing and the phenol red should be sucked towards the tube. This is what it looks like is happening for your stem data. However, the root should be doing the same thing and it looks like its just the opposite? On the other hand, if your data is really the pipette reading itself instead of the change in volume (and the pipette is inserted with the tip pointing out the way your photo shows) then your data suggests this tissue was consuming oxygen after all. Take a good look at your set up and notice that the change in readings from 0 to 0.9 will mean volume in the tube is INCREASING if the tip is pointing out, but will mean volume in the tube is DECREASING if the tip is pointed in. Finally, were these data collected before or after you decided to cover tubes with foil? This is REALLY interesting - - so many questions to answer before we can figure out what's going on! Dr. S |
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November 14, 2007 | 11:53 PM |
madison
(Team Member)
Hi Mr. Marshall D. Sunberg, Thank you for the comment. It will really help. We have changed and edited our procedures on our page. This will be a better experiment to run. We didnt know that we had to wrap our testubes in foil until yesterday. So we changed that in our procedures. |
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November 14, 2007 | 11:47 PM |
madison
(Team Member)
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November 13, 2007 | 11:17 PM |
John
(Team Member)
hi Mr. Marshall D. Sundberg Thanks for your help while we do our experiment. We as a group have talked about getting the same amount of mass of each part of the plant in each test tube. One way i can think of to stop photosynthes is to cover the test tube with something to keep the light out. thanks again, John |
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November 13, 2007 | 2:41 AM |
Dr. Marshall D. Sundberg
(Scientist/Mentor)
Hi JERMs You have a real interesting idea to test the respiration rates (use of oxygen) in different parts of the same plant. Here are just a couple of things to consider further. How much plant tissue should you put in the tubes? In general, the greater the volume of tissue relative to the volume of your tube, the easier it will be to measure changes in the gas volume. So, you might need tissue from more than one plant for each tube - - depending on the size of your plants. Second, How much of each type of tissue - - root, stem or leaf? If you're doing a comparison, the easiest thing is to have equal amounts of each. This is hard when different tissues have different shapes. Frequently we will resort to having the same fresh weight of each. Finally, one of you mentioned the problem with leaf tissue also photosynthesizing. If there is green tissue, photosynthesis will be occurring (and producing oxygen) along with respiration which will be using oxygen. Can you think of a technique that will prevent photosynthesis from occurring without affecting respiration (hint: this is only a problem because you are doing your experiment in clear glass tubes). I'm looking forward to seeing how you decide to adjust your proceedures - - and to seeing the data you generate! Good luck and have fun. Dr. S |
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November 13, 2007 | 12:40 AM |
John
(Team Member)
Hi John This is Claire Hemingway. I'm a mentor and help organize PlantingScience. I'm just trying out your login information to make sure it works. |
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November 5, 2007 | 2:13 AM |
Mr. Bill Dahl
Welcome to PlantingScience! Hi C.H. Yoe High School Team 2, I am pleased to welcome you to the PlantingScience online research community. I hope you are looking forward to this opportunity to share your ideas with a scientist mentor and your fellow plant researchers. I would like to introduce your scientist mentor, Dr. Marshall D. Sundberg of Emporia State University. He will soon post a hello, tell you a bit about himself and then follow your research throughout the project. In the meantime, remember, we are a Scientific Community. Don't hesitate to post any brainstorming ideas or questions for us. You may also want to spend time exploring other teams projects. Please feel free to ask questions and make comments to other teams. It may be that another team is running a similar project… you might even be able to share data. Have you reviewed the resources available for students on the PlantingScience website? If not, click here. These documents will give you a head start in getting your research set up. My favorite is the Guide to Using a Spreadsheet, but then I like seeing how data presents itself in a graphical form. All the very best and HAVE FUN with science! Bill Dahl |
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