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Poseidon & water potential HL

Is Poseidon"s trident really the origin of the Greek letter Psi Ψ?If you had to decide which symbol to use to represent the concept of water potential in Biology, what symbol would you choose, "W", "aq.", a crying emoji or something else?These slides show some of the details required for the HL section of this topic.Look at the slides and make a few notes of key details about water potential.

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