Advanced Placement / Biology


In this lab, students investigate the rate of transpiration in plants under normal and humid conditions. Then, they will have the opportunity to design their own inquiry experiments to test additional variables.

In the Initial Investigation, students create a potometer with a pressure sensor and monitor microclimate conditions using a weather sensor. The potometer measures transpiration by detecting changes in pressure due to the evaporation of water from the leaves of a plant sample. For their own experiments, students can use the potometer method or whole-plant method to measure how variables affect the rate of transpiration.

Source: Advanced Biology Through Inquiry

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Student Files

ADVBIO_11_Transpiration_S.docx 536.77 KB
ADVBIO_11_Transpiration_S.pdf 676.35 KB
ADVBIO_11_Transpiration.spklab 6.67 KB

Standards Correlations

IB Topics AP Topics
9.1 2; 4

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Pressure Sensor

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