Conversations - use this space to communicate about this project
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December 7, 2009 | 6:26 AM |
PS team
Thank you Thank you to everyone taking part in this inquiry. It was great fun to bring the students, teachers, and scientist mentors together online. There are many unanswered questions about plants----just waiting for young investigators to explore. We hope you are all going away with the confidence that you can take on new scientific challenges. Best wishes for the remainder of your school year! Sincerely, The PlantingScience team |
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November 29, 2009 | 6:11 AM |
trav34cardinals
(Team Member)
we have pretty much concluded the project our plants ended up dying. after they died i took them out of the soil gently and measured the roots and recorded he last measurements. the experiment wasnt a failure at all it showed that corn can be grown in sand and soil at pretty much the same rate. the plants died i think because there were dsays plants werent properly tooken care of for example over weekends plants werent covered to keep moisture in the soil. this is a mistake we can look back at and change the outcome of the experiment |
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November 11, 2009 | 9:57 PM |
kristen10
(Team Member)
yes we should summarize our experiment because our plants are dying |
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November 5, 2009 | 6:21 AM |
Dr. David Gadoury
(Scientist/Mentor)
Ready to analyze data? Hi, How much longer are you planning to collect height measurements on the plants? If you like, we can begin discussing how we might summarize and display the results of the experiment. |
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November 5, 2009 | 1:51 AM |
kristen10
(Team Member)
on november 5th plant #1 in pot 2 died. |
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October 27, 2009 | 2:05 AM |
kristen10
(Team Member)
on october 27,2009 Pot #1 seed 1 is now 10.5 cm seed 2 is now 6 cm Pot #2 seed 1 is now 8.5 cm seed 2 is now 7 cm Pot #3 seed 1 is now 13.5 cm seed 2 is now 2 cm |
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October 27, 2009 | 2:03 AM |
kristen10
(Team Member)
sorry the seeds were planted on october 15,2009 |
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October 27, 2009 | 2:02 AM |
kristen10
(Team Member)
on october 26, 2009 Pot #1 (sand) seed 1 grew 7.5 cm seed 2 grew 4 cm Pot #2(mixed) seed 1 grew 6 cm seed 2 grew 4 cm Pot #3 seed 1 grew 9 cm seed 2 grew 1.5 cm the seeds were planted on october 19, 2009 |
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October 27, 2009 | 1:54 AM |
kristen10
(Team Member)
We have three pots, the first is just plain sand, pot #2 is soil and sand mixed, and pot #3 is plain soil. There are two corn seeds in all three pots, and they are watered everyday. |
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October 16, 2009 | 7:33 PM |
Dr. David Gadoury
(Scientist/Mentor)
Experimental design Good morning, I'd suggest we stick with just one type of seed (corn) and expand some other parts of the experiment. Here's the reasoning: 1. You're measuring height. Corn is a good choice, as most of the growth response will be reflected in height of the plant. If you take more than one measurement over a period of days, we can compute the "rate" of growth as well as final height. Two responses measured are better than one in any experiment. 2. You might confound your experiment by mixing soil with the sand. How about making the two treatments really different to maximize the treatment effect: one soil, and the other only sand? We'll talk more about "proof of principle" experiments later. 3. You should "replicate" your treatments when possible, or repeat the experiment to show that the observed effect was "real". So, if possible, use 3 pots of sand (each with 2 seeds) and 3 pots with soil (again, 2 seeds per pot). The pots can be really small - 2 inch pots or a styrofoam cup would do just fine. |
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October 16, 2009 | 1:39 AM |
kristen10
(Team Member)
we will measure height of the plant, and how quickly each grows. There will be two pots one with just soil and the other with sand and soil mixed. And in each there will be two corn seeds. The height will be measured everyday. |
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October 16, 2009 | 1:36 AM |
petalpusher
(Student, Daisy Dukes - SCH_F09_W03 · -1)
you guys might wana think about doing another seed other then just corn, it may show different results |
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October 13, 2009 | 10:54 AM |
Dr. David Gadoury
(Scientist/Mentor)
The research question Greetings from the New York State Agricultural Experiment Station! OK, this looks like a straightforward research project. Let's talk about defining the system a bit better. 1. Are you going to amend the sand or soil with any fertilizer? 2. What response will you measure? Height? Weight If weight, will it be fresh weight, dry weight, or both? Why do you suppose you might measure more than one? 3. How many plants will you grow? 4. Will you replicate your treatments (sand vs soil)? 5. When will you take measurements, and how often? 6. When do you think you might start to see a difference between the two treatments, and why? 7. Will you use any statistical test to compare the results? Let's say you get slightly taller plants in sand on day 10, but with lower dry weight. How will you know that the differences are "significant"? There are mathematical test we can use to answer that question. We can also look at simple math expressions for the variability of what we are measuring. You tell me how "in depth" you'd like this project to be. For further study, you might do a search of the internet for the following terms to become familiar with some important concepts as they relate to your experiment: "soil health" and "cation exchange capacity". Cheers, David Gadoury |
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October 12, 2009 | 10:35 PM |
trav34cardinals
(Team Member)
prediction i wonder if our plant would even grow under sand? |
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October 12, 2009 | 10:30 PM |
kristen10
(Team Member)
our plants will both be under lights, not in darkness. |
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October 12, 2009 | 10:27 PM |
petalpusher
(Student, Daisy Dukes - SCH_F09_W03 · -1)
prediction i agree that the plant under the light will grow better. but im not sure it the one in the dark will even grow at all that is if its in complete darkness. |
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October 6, 2009 | 5:32 AM |
PS team
Hello I am happy to welcome you to this community of plant researchers. Your team has the opportunity to communicate directly with a scientist who will help you focus your ideas as you develop your research question and experimental design. Your scientist mentor is Dr. Gadoury from Cornell University. Please introduce yourself and post some possible research topic ideas to get a conversation rolling. Best wishes as you embark on this scientific journey. We are all pleased to share this experience with you. Have fun! Jennifer Potratz and the PlantingScience team |
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