Abstract
Water transport in tall trees is an everyday phenomenon, seldom noticed and notcompletely understood even by scientists. As a topic of current research in plant physiologyit has several advantages for presentation within school physics lectures: it isinterdisciplinary and clearly shows the connection between physics and biology; theconstruction of an artificial tree is an ideal laboratory project, which enables detailedstudies of several phenomena related to water transport in an artificial tree model; it alsoclearly shows the failures of widespread ideas about the origins of the upward water flow.We present the construction of the laboratory tree, suggest measurements that illustratewater transport and present a few additional experiments which clearly show whywater transport in trees higher than 10 m is still an ongoing debate amongst plantphysiologists.
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