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- 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.
knowledge.carolina.com/discipline/earth-environmental/photosynthesis-and-floating-leaf-disks/Photosynthesis and Floating Leaf Disks - Carolina Knowledge ...
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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.
Do your leaf disks start to float sooner in a colder or a warmer baking soda solution? Test how the intensity of the light affects photosynthesis. Place the cup closer to your light source and farther away.
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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.
Jul 11, 2023 · Which product of photosynthesis will accumulate in the spongy mesophyll and cause the leaf disks to float? For photosynthesis to occur in the leaf disks that have had the air sucked out, you will need to provide the leaf disks with light and a good source of CO 2 dissolved in water.
As photosynthesis proceeds oxygen is released into the interior of the leaf which changes the buoyancy--causing the disks to rise. Since cellular respiration is taking place at the same time, consuming oxygen, the rate that the disks rise is an indirect measurement of the net rate of photosynthesis.
During cellular respiration, plants use the sugar they produced during photosynthesis as an energy source, together with the oxygen, to create carbon dioxide and water. This means the oxygen bubbles that make the leaf disks float get consumed over time and the leaf disks sink.
