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


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

Teacher Files

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Standards Correlations

IB Topics AP Topics
9.1 2; 4

Featured Equipment

Weather Sensor with GPS

Wireless Weather Sensor with GPS

This sensor is packed with 19 different measurements, including GPS, that can be monitored live or collected over the long term.

Pressure Sensor

Wireless Pressure Sensor

The Wireless Pressure Sensor accurately and consistently measures absolute gas pressure.

Many lab activities can be conducted with our Wireless, PASPORT, or even ScienceWorkshop sensors and equipment. For assistance with substituting compatible instruments, contact PASCO Technical Support. We're here to help.

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