Advanced Placement / Biology

Transpiration

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.

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Standards Correlations

IB Topics AP Topics
9.1 2; 4

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Weather Sensor with GPS

Wireless Weather Sensor with GPS

This sensor is packed with GPS and 19 different measurements 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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