Thank you for all your time and helpful information throughout our project. Your suggestions and questions really helped us look deeper into our tests and experiments to learn more about photosynthesis. From Suki,  Angie, McKenna, and Lairah!

We think the change in pH was so small due to two factors. The first one is that the sample we used of our plant was very small. Because we only used a few small hole punched disks, the CO2 released could have been a very small amount, and that could be why it did not affect the pH dramatically. The second reason is that we only left the experiment to change for about a day, so maybe we did not give it enough time to fully complete the process.

Our predictions were accurate and supported by the evidence from our experiment. However, we predicted that there was going to be a more dramatic increase/decrease in pH but we were wrong. Our results were not tooo dramatic meaning there was not a lot of carbon dioxide produced overall.

Looking great, team. What is next?

We measured our experiment for 24 hours.

We think that without the presence of light, the amount of carbon dioxide would increase causing the pH of the solutions in the dark to decrease. Without light, plants can only go through the process of cellular respiration. When the plant is in light it would go through photosynthesis (producing oxygen) as well as cellular respiration (producing carbon dioxide). 

Independent Variable: the light/dark environment in which the solution is placed in

Dependent Variable: The pH of the solution after 24 hours

Control Factors: the plant specie, the amount of time it was in the light/dark, the amount of water that was in the solution

Day 3 Update: We took our the 3 solution in the dark and measured the pH. The pH was lower than it was 24 hours previous which helped us determine that there was more carbon dioxide in the solution than there was 24 hours ago. 

Research Question: Is more carbon dioxide produced in a light or dark environment?

It was surprising to learn that plants do not need soil to photosynthesize. Plants use soil to obtain the little nitrogen they have in their system.

Day 2 update: The plant we used was the scindapsus jade pothos. We measured the pH of the solutions in light and the pH increased which was what we expected. Through photosynthesis, oxygen was produced which lowered the amount of CO2 and raising the pH. The solution is the dark were knocked over so we are redoing it. For the two cups in the dark that was not knocked over we measured the pH and was not what we expected so we are redoing it. We will keep you updated.

We are now doing our own experiment. We know that CO2 will make the pH of a solution more acidic when present. We decided to use this information to test for CO2 in different solutions with indicators. We made 6 solutions. In two cups, we used lime water as our indicator. In two other cups, we used phenol red. And in the last two cups, we used universal indicator to test for the presence of CO2. We will be removing the oxygen from leaf disks that we punched out by using suction in a syringe. We will then add 6 disks into each solution we made. We will then put one of each solution we made into light, and one of each into dark. We will check back in 24 hours to see if any changes were made in the color from our indicator solutions. If so, we will determine if it was in fact CO2 that caused the change. 

We wanted to confirm the role of Carbon, as well as rule out the specific functions of some parts of a plant growing gaining weight/ mass. After observation, and studying a different lab that tested the same thing, we saw that after 5 years, the soil where a tree seed was planted did not lose mass even though the tree was growing. From this, we could determine that the tree does not get mass from the soil. We then saw a chart with the common molecules in plants. We saw that carbon was the most abundant. So we looked where carbon was present, and saw that CO2 is a reactant input in photosynthesis. From this we determined that most of the trees mass would have come from carbon, and that the C is coming from CO2.

To answer your question: The carbiantion in the cup carbon dioxide, which is a reactant that is needed for photosynthesis. 

We did a lab experiment with elodea and phenol red. There were 4 tubes that we filled with the phenol red solution, and then we put a piece of elodea in two of the tubes.  Next we blew through a straw into all of the tube so that CO2 was present. The solution turned yellow when we did this, showing a pH drop. We took one tube containing elodea, and one without, and placed it in a dark space under a box. We did the same and placed the tubes by a bright light. After 24 hours, the elodea in the light turned the solution from yellow, to pink. This was because the CO2 was used up in photosynthesis. But, the solution of the elodea in the dark stayed yellow. This is because the CO2 was NOT all used up. 

We may be doing the lab again so if we do, and get different results, I will update you with any changes!

We saw more bubbles in the baking soda cup than in the one without since the solution with baking soda was carbonated.

We believe, after studying the photosynthesis equation, that the gas is oxygen, because it is a product of the reaction. We will be continuing the lab on Thursday, and will update you with our results. During our lab we will use phenol red, an indicator for oxygen, in our solutions to help solidify our hypothesis. 

We recently finished our leaf disk project. We were looking to see how or if carbon dioxide affects the disks and photosynthesis. Our results were: for water, we had one disk out of 12 that did not sink like it was supposed to, so we had to disregard. For baking soda, after 15 minutes, 4 disks were floating. Finally in breath, after 15 minutes, only one of our disks were floating. We do think that there is a possibility that all of our disks were not properly sunk in the syringe, so maybe that is why we had a few inconsistencies. We also observed that small bubbles formed around the disks in the baking soda water. How should we go about figuring out what these bubbles are? Also, do you have any suggestions on how to get better, more accurate results when we try this lab again to get the best data? 

My favorite plant is the nymphaea lotus.

Hello Team!

I’m Gabriela, your liaison. I’m an Environmental and Sanitary Engineer from São Paulo, Brazil. Also, I am a Master’s student in Plant Biology at Oklahoma State University.

My role as liaison is to support you and check in to be sure everything goes well with your group. Also, I may step in to respond to the students if the mentor hasn’t responded to their questions in 2-3 days. Whenever I do so, it doesn't stop the mentor from continuing to communicate with the group. 
My research is related to ecology and climate change. Have you noticed how climate has been changing through the last decades? Do you know why and how this is happening? 
I’ve been interested in plants since my childhood. I remember my mom making tea with medicinal herbs and I was amazed about how the plants can help us. Do you usually use medicinal herbs too? If so, which ones? My favorite ones are lavender and rosemary!
In my free time, I like hiking and traveling to know new places. What is your favorite trip so far? Also, I play flute and like to learn new music. What about you, what do you like to do in your free time?

Looking forward to meeting you all!

Gabriela

Hello team, I'm happy to meet you all! I am the mentor for this group. I'm wrapping up my PhD at Northwestern University and the Chicago Botanic Garden. My research is on a genus of plants called Impatiens. In particular I focus on all the species of Impatiens that are found in Tanzania, so about once each year I go to East Africa to do field work for a few months. To answer your question, I started studying plants 7 years ago when I started a Masters program in Plant Biology. I studied humanities in college and switched careers to plant biology. I have a question I like to ask students-- what is your favorite plant? 

Hi! My name is McKenna. I am a student in AP Biology. This is my first time studying plants. I look forward to learning more and experimenting with plants. How long have you been studying plants?

Hi my name is Suki and I am a junior studying AP Biology as well as Honors Anatomy and Physiology. I love learning about the organization of cells and how structure relates to function. I also enjoy studying the different variety of plants. This is my first official research project and I am so excited to be a part of your team. I look forward to getting to know you.

Welcome to your PlantingScience project page!

Welcome to this community of plant researchers. As your team plans and conducts your own research project, you will be mentored by a scientist. The mentor's role is to encourage and guide you through the process of scientific discovery. The more you share your ideas and research information online, the more your mentor can help. You can also find out more about your mentor. What is their research about? Why did they go into science? What do they like to do when they are not working?

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