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- The leaf disks intake carbon dioxide from a baking soda solution and sink to the bottom of a cup of water. When exposed to light, the disks use carbon dioxide and water to produce oxygen and glucose. Oxygen released from the leaves forms tiny bubbles that cause the leaves to float.
www.thoughtco.com/floating-spinach-disks-photosynthesis-demonstration-604256Floating Spinach Disks Photosynthesis Demonstration - ThoughtCo
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This video is about photosynthesis and covers the AP Biology lab "What factors affect the rate of photosynthesis in living leaves".
- 9 min
- 23.3K
- Madden Science
May 8, 2021 · Oxygen released from the spinach forms small bubbles that cause the leaves to float. This lab demonstrates the need for light, carbon dioxide and water as inputs to photosynthesis and provides ...
- 3 min
- 8.1K
- Science Snippets
Feb 21, 2024 · In this method video, Molly takes us into the lab to perform a leaf disk assay to measure the rate of photosynthesis in spinach leaves. View this video (and more like it) on LabXchange: https...
- 8 min
- 11.4K
- LabXchange
- Conducting The Floating Leaf Disk Assay
- Analyzing Your Results
- Changing Variables to Investigate Photosynthesis
Before you start testing different variables, conduct the leaf disk assay once to get familiar with the procedure. The video Measure Photosynthesis with Floating Leavesdemonstrates how to do each individual step. You will do all your experiments in triplicates after your test run; the following instructions are for the three trials of your experime...
For each cup, create a graph from your data table that shows the number of floating leaf disks over time. Plot the time on the x-axis and the number of floating leaf disks on the y-axis. An example...
Now that you are familiar with the leaf disk assay procedure and data analysis, you are ready to start your own investigations.Choose one variable that you want to investigate. You can find some suggestions in Table 2. The table also provides some possible variations for each variable that you can test.The leaf disks should float in the solution (see photos below). Hold the syringe with the tip up, and expel the air by gently pushing on the plunger. Plug the tip of the syringe tightly with your finger, and gently pull on the plunger, creating a slight vacuum.
Jun 30, 2019 · Watch spinach leaf disks rise and fall in a baking soda solution in response to photosynthesis. The leaf disks intake carbon dioxide from a baking soda solution and sink to the bottom of a cup of water.
The leaf disks will be floating. Make sure they are all in the water. Close the tip and pull back on the syringe plunger to create a vacuum. Hold for 10 seconds. This process helps remove air from the spongy mesophyll layer of the leaf disks, causing them to sink in the solution. Continue until all of the disks have sunk in the syringe.
