Experiments
Here are experiments our science specialists have selected to support this IB* topic.
Transpiration of Plants
Experiment #13 from Investigating Biology through Inquiry
In this Preliminary Activity, you will use a Gas Pressure Sensor to measure transpiration rates under different conditions. The data will be collected by measuring pressure changes as the plant takes up water into the stem.
After completing the Preliminary Activity, you will first use reference sources to find out more about transpiration before you choose and investigate a researchable question dealing with transpiration rate. Some topics to consider in your reference search are:
- transpiration
- cohesion-tension theory
- water potential
- osmosis
- stomata
- water potential gradient
- xylem
- mesophyll cell
Transpiration
Experiment #10 from Biology with Vernier
In this experiment, you will
- Observe how transpiration relates to the overall process of water transport in plants.
- Use a Gas Pressure Sensor to measure the rate of transpiration.
- Determine the effect of light intensity, humidity, wind, and temperature on the rate of transpiration of a plant cutting.
- Educational Standard
- International Baccalaureate (IB) 2025
- Subject
- Biology
- Theme
- D Continuity and change
- Level of organization
- 2 Cells
- Topic
- D2.3 Water potential
- Section
- Standard level and higher level
* The IB Diploma Program is an official program of the International Baccalaureate Organization (IBO) which authorizes schools to offer it. The material available here has been developed independently of the IBO and is not endorsed by it.