I think the purpose of this project was to see how the mung beans and pieces of corn grew. And to see how they grew, and what the process looked like. It was also to see if they were monocots or dicots. Corn is a monocot and a mung bean is a dicot, which means they have different root systems, amounts of flowers, vascular systems, etc. One obvious change I saw was the beans sprouting. First, the outer layer of the beans opened up and a small stem grew out of it. They started to have roots and grow leaves. I don't know what would happen after that because all of mine died. The paper towel that was in the cup also started turning yellow. I’m not sure why it did that, but it started to smell pretty bad.
Before we put the beans and corn in the cup, we predicted which would be a monocot and which would be a dicot. I predicted that the mung beans were going to be a monocot and that the corn was going be a dicot, but I was wrong. Corn is a monocot because its vascular system has holes all over the place, whereas mung beans only have holes around the outsides of its stems, making them a dicot. (See picture below.)
In the end, my plants neither drown or thrived. They all died. I think they died because I left them on a window sill and they shriveled up, probably because it was too hot. I should have watered them more and put them on a table next to the window so they could still get sunlight, but not to much. If we do this again, I'm definitely to find another place to put my cup so that they survive for longer and grow more.
I think we did this to further our understanding of what photosynthesis is and how it works. That's definitely something I got out of this. Before this lab, I didn't really understand how photosynthesis worked. You might be thinking, "Wow, this girl is really dumb haha." But seriously, I didn't get it. We all learned it in 4th grade or something, but I've never really understood science very much. So when we did this, I was excited I actually understood it. Photosynthesis is the process plants use to turn carbon dioxide and water into food for themselves. We did a lab to help see how plants did it. In this lab, I observed that it takes a while for photosynthesis to actually happen. We hole punched some leaves and shook them up in carbon dioxide. Once they all sunk to the bottom, we put them in a cup of water and either put them underneath a black or white light (I chose white light), and timed how long to took for them to float to the surface. Our teacher thought it was only going to take about 20 minutes, but it took much longer than that. My leaves didn't start floating until they had been in the water for 40 minutes!
This is a picture of how photosynthesis works. I didn't use one with the element names because that can be confusing.
This is a graph of some of the data collected by a few of my classmates.
A major trend I found in this data was that at the beginning of the experiment the leaves aren't doing anything, but they peak rapidly. You can see this mostly with the yellow line on the graph. This data was collected from people who used white light, and both aspen and spinach leaves, but I'm not sure how far away the leaves were from the light, it wasn't included in the Google Sheets document. I think the line that gives the most information in the graph is the red one, Brittan's. It was slow at first, then shot up, leveled out again, and then slowly went all of the way up. I'm pretty sure it's the only one that had all of the leaves float (according to this data and graph).
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