What are Osmosis and Hypo/Hyper/Isotonic Solutions? And how do they work?
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https://www.khanacademy.org/science/ap-biology/cell-structure-and-function/mechanisms-of-transport-tonicity-and-osmoregulation/v/osmosis
Osmosis is water moving across a semi-permeable membrane. You can picture it as water wanting to even things out. Matter doesn’t “like” to be scrunched up, it wants to spread out if it has enough energy.
If you have a wall that only lets water through, water will want to go dilute the dissolved solids like salt or sugar. In biology the iso is in reference to a typical cell. If you stick a cell in a super salty solution, the water in the cell will leave. If you stick a cell in pure water, the water will go in. A classic demonstration is egg in vinegar: https://onelittleproject.com/egg-in-vinegar-experiment/
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