#BioNation/ Cumberland Regional High School / CRHS_S12_P01

School Level: High School
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Research Information


Research Question
Does color of light effect the growth of photosynthesis?

Research Predictions
white light will photosyntheize the plants more than the others. Green will the least. The darker colors will grow taller and thinner.

Experimental Design
-10 pansies
-2 plants per color
-color of lights:
--red
--green
--yellow
--blue
--clear
-50 mL of water a day.
-measure growth
-measure color
-measure health

Research Conclusions
Our hypothesis was mainly right. The clear did grow the best, but the yellow grew well, too. The green did the worst, along with red. Blue (darkest color) grew the tallest.
Sources of error could have been the amount of light recieved or the variations of measurements.
As another experiment, we could see how different temperatures effect the plants. Or we could do the same experiment with the colored lights, but with different plants.


Conversations - use this space to communicate about this project


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April 27, 2012 | 4:40 AM | cartastic14  (Team Member)


Thank you for your help :) Youve been a real help to get us to our conclusion, and were still workingand observing. WE prolly couldnt have done this correctly without you guys, thanks again

-Molly :)
April 27, 2012 | 4:38 AM | laxin  (Team Member)


thank you courtney for working with us i appreciate your time.
April 27, 2012 | 4:37 AM | xxash45xx  (Team Member)


Courtney,

Thanks so much for working with us! I'm pretty sure she meant the moisture of the soil, and if the leaves looked dry or not. I'm not sure about the different light environments effecting the moisture levels, but it could be a possibility. Thanks again!

-Ashley :)
April 27, 2012 | 4:35 AM | angie1  (Team Member)


We meant the moisture in the leaves. And yes, we do think that due to the light it may 'consume' water faster than the other light variations. but thank you so much for helping us with our experient. You helped us open our experiment and helped us organize our studies. thank you for taking the time to help us out!

sincerely,
Angie. :)
April 26, 2012 | 11:29 AM | Courtney Angelo  (Scientist/Mentor)

Bionation
Hi Bionation,

When you say you are checking the moisture of the plant, do you mean the soil moisture? Or if the plant looks wet or has dew on it? Do you think there is variation in the moisture levels due to the placement of the plants in different light environments?

Keep up the good work! - Courtney
April 26, 2012 | 5:35 AM | angie1  (Team Member)


Courtney,

We are defining plant health by how dry or green the plant is. If the plant is brownish, it obviously isn't healthy. If it is dark green than it is healthy. We are also checking the moisture of the plant. If it looks dry than it obviously isn't going to be as healthy as the moist plants.

-Angie
April 24, 2012 | 12:09 PM | Courtney Angelo  (Scientist/Mentor)

Hi
Hi Bionation,

I'm glad to hear that everything is going well and that you are seeing some differences in your treatments. How are you defining plant health? I see that you have it listed in your experimental design.

- Courtney
April 24, 2012 | 5:33 AM | angie1  (Team Member)


Courtney,

So far the experiment is still going well. The different colors of light are starting to show differences in the plants.

-Angie
April 20, 2012 | 7:18 PM | xxash45xx  (Team Member)


Courtney,

The leaf floatation technique is to see how fast photosynthesis takes place in a sample. Since we have five different conditions for our plants, we used five leaves (one from each condition) and took five punched-out circles from each. Then we put them in a sodium bicarbonate solution with a drop of dish soap to allow the solution and water to enter the leaves if they were hydrophobic. Then with a syringe thing, we got the air out and put them in five different petri dishes (one per condition) and added the solution to it. When put under light, the little leaf circles should perform photosynthesis and float to the top. Sadly, ours did not work as planned, and we recorded it as is. The plants have been under the different colored lights for three days.

-Ashley
April 20, 2012 | 9:42 AM | Courtney Angelo  (Scientist/Mentor)

Bionation
Is the leaf floatation technique used to look at pigments in the leaves? I'm not too sure what you are doing. Are you trying to see if the different colors of light changed the pigments found in the leaves? How long have the plants been under the different lights? Do you think you will see a response this soon. Let me know how it goes.

Good luck,
Courtney
April 19, 2012 | 8:29 PM | xxash45xx  (Team Member)


Courtney,

tomorrow we are doing the leaf floatation technique. We have all of our supplies together and ready for the experiment. Hopefully everything will turn out how it is supposed to. :)

-Ashley
April 19, 2012 | 5:53 AM | angie1  (Team Member)

Measurements So Far (cont.):
Red (Cont.)
plant 1: 4 1/2 cm plant 2: 6 cm

blue: got taller looks unhealthier (3 buds)
plant 1: 6 1/2 cm plant 2: 7 cm

green: look slightly healthier
plant 1: 5 cm plant 2: 5 1/2 cm

yellow: looks about as healthy as yesterday (2 buds)
plant 1: 4 1/2 cm plant 2: 7 cm

clear: looks healthier
plant 1: 5 cm plant 2: 6 1/2 cm

thank you! :)

-Angie
April 19, 2012 | 5:47 AM | angie1  (Team Member)

Measurements so far:
Day 1:

Red: They basically look the same.
plant 1: 4 1 1/2 cm plant 2: 6 cm

blue: look the same
plant 1: 5 plant 2: 7

green: look the same
plant 1&2: 5 1/2 cm

yellow: looks the same
plant 1: 4 cm \plant 2: 6 1/2

clear: look the same
plant 1: 4.8 cm plant 2: 5 cm

Day 2: Red: look healthier (bud)
April 19, 2012 | 5:43 AM | angie1  (Team Member)


Courtney,

Thank you! :) We predict that the clear light will let all the 'normal' light in. (The light that the plants are used too) We also predict that the darker colors will make the plants grow taller (reach up) and skinnier (stretched) in order to find the light to help them with photosynthesis. The green light would be reflected, and that is why we predict it will be the worst.

-Angie
April 17, 2012 | 7:18 PM | Courtney Angelo  (Scientist/Mentor)

Experimental Design
Hey Bionation,

It seems like you have your experimental design, hypothesis, and types of measurements figured out for your experiment. Great job! How long will you grow your plants under these conditions? Remember to try and keep all other conditions the same across light treatments such as the amount of water and nutrients you might give the plants. This will ensure that the differences you are seeing between light treatments is actually due to the light and not some other factor. Why do you think that the white light will make the plants photosynthesize the most? Do you think the green light might be the worst, why? Let me know what you're thinking. Good luck.
- Courtney
April 17, 2012 | 6:10 PM | xxash45xx  (Team Member)


Courtney,

We finished setting up our experiment today and it is in the school's greenhouse. I agree with Angie in thinking that the clear light will be best for photosynthesis. I'll make sure to ask my other two partners what they think and hopefully we'll all agree on something. Thanks for guiding us in the right direction!

-Ashley
April 17, 2012 | 3:26 PM | angie1  (Team Member)


Courtney,

We will be doing a leaf disk test and thymol blue test as well.

-Angie
April 17, 2012 | 3:20 PM | angie1  (Team Member)


Courtney,

thank you! :) For the experiment we removed the flowers, we are going to measure the height of the plant, the leaves, and the pigment, or color of the leaves. I personally think that the clear light will make the plants photosynthesize the most. Thank you for helping!

Sincerely,
Angie
April 14, 2012 | 11:20 AM | Courtney Angelo  (Scientist/Mentor)

Experimental Design
Hi Bionation,

Good job on coming up with a project! Yes you have a good idea. What changes are you planning on measuring? Are you going to measure the height of the plant, number of leaves, number of flowers? Do you have any hypotheses for your experiment? Which color of light do you think will make the plants photosynthesize the most? I think the next would be to come up with your hypotheses and figure out exactly what you will be measuring on the plants. Let me know what you decide. Good job!

- Courtney
April 13, 2012 | 5:54 AM | xxash45xx  (Team Member)

Project
Congratulations on almost finishing your PhD! Today we came up with our idea on our experiment. Angie sent you the brief details on our experiment. Do you think it's a good plan so far?

Sincerely,
Ashley :)
April 13, 2012 | 5:51 AM | angie1  (Team Member)


Courtney,

For our research experiment we are taking ten pansies plants and placing them under different color lightings. The colors are yellow, blue, red, and green. We will place two plants under each light and two plants under a regular white light. Our observations will be taken on the different changes and different processes of photosynthesis under each light. Thank you for taking your time to help our study. :)

Sincerely,
Angie
April 13, 2012 | 5:46 AM | angie1  (Team Member)

Introductions
Hi Courtney,

My name is Angie. I am another team member and a sophmore at CRHS. I am looking foward to this research project.
April 5, 2012 | 9:47 AM | Courtney Angelo  (Scientist/Mentor)

Welcome
Hi Bionation,
Thank you for the introductions. My research is going well and I'm about to finish my PhD at the University of Hawaii. How is your research project coming along? Do you have any ideas for your project? Let me know what you are thinking so we can discuss your ideas and possible experimental designs.
April 4, 2012 | 10:03 AM | Dr. Catrina Adams

Welcome!
I am happy to welcome you to this community of plant researchers. Your team has the opportunity to be mentored by a scientist to help you develop and perform your own research project. The mentor's role is to encourage and guide you through the scientific process of discovery. The more you share your ideas and research information online, the more your mentor can help.

Your scientist mentor for this project will be Courtney Angelo from University of Hawaii at Manoa, Botany Department. Please introduce yourself and post some possible research topic ideas to get a conversation rolling.

These resources are available to help you get started:
Thinking Like a Scientist / Working Like a Scientist
Designing Experiments
Guide to Using A Spreadsheet

Best wishes as you start this scientific journey. We are all pleased to share this experience with you.
Have fun!

Sincerely,
The PlantingScience team
April 4, 2012 | 5:53 AM | laxin  (Team Member)

Thank you for helping us.
Hello Courtney, my name is Tyler. I am a freshmen at Cumberland Regional, I like to play baseball and biology is not really my thing.
April 4, 2012 | 5:50 AM | xxash45xx  (Team Member)

Introductions
Hi Courtney,

My name is Ashley and I am a freshman in CRHS. My group and I are looking forward to working with you in figuring out our problem.
April 4, 2012 | 5:35 AM | cartastic14  (Team Member)


Hey courtney, have you made any recent discoveries with your research? Whats your project your currently working on? WHats your hypothesis for it? It sounds like a facinating subject to study, if you have any interesting information, let us know :)
March 30, 2012 | 10:24 AM | Courtney Angelo  (Scientist/Mentor)

Welcome
Hi BioNation,

My name is Courtney Angelo and I'm a PhD candidate at the University of Hawaii at Manoa. My work looks at plants with different photosynthetic pathways and how they respond to aspects of climate change. I'm looking forward to working with you on your project. Please, let me know what you are planning on doing; so we can figure out your experimental design.

Thanks,
Courtney




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