|Explore||Plants are green from the chlorophyll in the chloroplasts and they perform photosynthesis, and then cellular respiration to produce oxygen in the air, for us to breathe. We have discovered that plants make glucose via photosynthesis then the glucose produced from photosynthesis is used in...|
|Research Question||We want to test how different colors of light affect the rate of photosynthesis. We came up with the question by compiling 2 other questions with it and selecting the best one. The question fits what we know about the topic by telling us how different light wavelengths affect photosynthesis.|
|Predictions||In the blue light, everything floats, and in the yellow light, very few float. This will happen, because in blue light, the plants absorb most of that light, and in the yellow light, they won't absorb as much of the light. In the red light most of the leaf disks will float because plants absorb a...|
|Experimental Design||1. Prepare three beakers with 100 mL of distilled water and a pinch of baking soda. 2. Punch holes in spinach leaves to create leaf disks. 3. Infiltrate the leaf disks to remove any oxygen. 4. Cellophane bags (red, blue, and yellow) will be placed over the beakers. 4a. One beaker will have...|
|Conclusion||The colored light sources affected photosynthesis by affecting how many leaf disks floated. The disks in the yellow and red light had more floating, whereas the disks in the blue light had one disk floating. The red light is absorbed more by plants, but yellow is supposed to not be absorbed as...|
Thank you so much for helping us with this project, we hope it will become a success. You have helped us greatly with this, and for that we say thank you. We will miss you, even though I was not able to talk to you as much as I would have liked to. You seem like a great scientist, and a great person in general. I hope you will have a great time there, and that you will be able to help multiple people, and make this world better. I wish you will stay strong, and that you know that what you have helped us with means the world to us. You will truly be missed by Anthony, Anna, and I. Goodbye.
The inevitable has come and it is time to say goodbye. Thank you, Julia, for helping us through the experiments and processes. Thank you for taking time out of your life to help us. I'm not that good at this kind of stuff, so goodbye.
I saw your conclusions posted on the info page. You did an excellent job interpreting your findings and comparing them to your hypothesis and prediction. I must say that I'm not too surprised that it turned out this way. When I teach photosynthesis to freshman students here at UD, we do a similar experiment in our lab. We also use cellophane to create different colors of light and my students get unexpected results too. I suspect that maybe the cellophane isn't filtering the colors of light the way we expect it too. Or perhaps the thickness or intensity of color in the cellophane (how light or dark it is) might be affecting the amount of light that goes through it. Those are my best guesses! Do you have any additional thoughts or observations on this?
So for today's experiment we tested how light and dark effects photosynthesis. We had a light and dark cup, we did the vacuum with the leaf disks again, then we put the light cup in the light, and the dark in the dark. After 15 minutes we switched the light and the dark cups, so that dark was in the light and light was in the dark. When the 15 minutes were up, we dumped out the dark cup and put the light cup in the cabinet.
That's okay! As a scientist, it's always better to admit that you're unsure or don't know something. Let's think: glucose is similar to sucrose, which is basically like sugar you would buy at the store for baking. So, is that a solid, liquid, or gas?
So now that you've done the first leaf disk experiment, you know that plants are taking carbon dioxide out of the air to use for photosynthesis (I gathered that you know this from the files you uploaded). Carbon dioxide is a gas, right? Anna - you mentioned that photosynthesis produces glucose. Glucose exists in what state of matter? (Is it a liquid, gas, or solid?)
Another set of projects I've been involved with research ways to make places that have been surface mined for coal go back to forest after the mining is finished. The major problem with these areas is that the soil is packed down too hard when the mining companies put it back in place. This makes it very hard to trees to grow because their roots can't penetrate the soil. One project I helped with plowed an old mine site with a tractor to break up the soil, and we found that it was much easier for trees to establish there. This was a really great breakthrough for making sure that places that were once forested go back to being forest after mining activity.
Anna - marine biology would be very cool! As a graduate student, part of what I do is teach lab courses and one of them is invertebrate zoology. In that lab we cover all sorts of marine organisms, ranging from corals to squids, and I just find it all so fascinating!
Anthony - Being successful is a good goal to have! No need to have it all figured out right now. I always knew I loved science, but it took me longer to figure out that I loved teaching, too. And now I want to teach science at a college or university for a living.
I don't know that I've made any amazing breakthroughs, but my research is unique because a lot of it focuses on old-growth forest (forest that has never been cut down - there is very little of it left in the U.S.). So I'm able to give information about what forests in the U.S. would look like if humans hadn't cut them all down. This is important because old-growth forests serve as reference ecosystems that land managers can use as models for restoring cut or otherwise disturbed forests to what they would be naturally.
I don't know what I'll be when I grow up. My only goal is to be successful.
Have you made any amazing breakthroughs?