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- Plant material will generally float in water. This is because leaves have air in the spaces between cells, which helps them collect CO 2 gas from their environment to use in photosynthesis. When you apply a gentle vacuum to the leaf disks in solution, this air is forced out and replaced with solution, causing the leaves to sink.
www.exploratorium.edu/snacks/photosynthetic-floatation
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In this fun plant biology project, you will explore how plants use photosynthesis to make energy for themselves with the help of the floating leaf disk assay.
When you see tiny bubbles forming on the leaf disks during this experiment, you’re actually observing the net production of O 2 gas as a byproduct of photosynthesis. Accumulation of O 2 on the disks causes them to float.
Jul 26, 2022 · As oxygen is produced by photosynthesis, it comes out of solution and infiltrates the leaf tissue, replacing some of the water. This decreases the density of the disks, and they begin to float. The number of disks that float per unit of time gives a measure of the rate of photosynthesis.
The leaf disk assay measures the rate of oxygen production in the leaf disks, which is a representation for the rate of photosynthesis. When you placed the leaf disks in your syringe, you probably noticed that they all floated on top of the solution.
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Jun 30, 2019 · 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.
- Anne Marie Helmenstine, Ph.D.
Jul 11, 2023 · You will use the "floating leaf disk" method to measure the rate of photosynthesis. To begin, cut several disks from a spinach leaf and put these leaf disks in a cup of water. 1. Do your leaf disks float? Use the information in this diagram of a cross-section of a leaf to explain why a leaf disk would float. 2. Where does photosynthesis occur ...
Biology. Floating Leaf Disk Photosynthesis Lab. By Kim. I use this experiment to reinforce what we’ve been learning in the photosynthesis lessons. I will be using principles of experimental design, scientific method, and CER as well. The floating leaf disk photosynthesis lab is pretty accessible.
