Featured in PASCO’s Biology through Inquiry Teacher Guide
Features 25 inquiry based labs covering the fundamental concepts of cell biology, ecology and physiology.
Use a barometer/low pressure sensor to explore the effects of environmental factors such as air movement on the rate of transpiration.
In this exploration, students use a barometer as a potometer to measure the rate of water uptake in plants due to transpiration.
- This activity demonstrates the concept of "transpiration pull".
- Students explore the effects of environmental factors, such as air movement, on the rate of transpiration.
Students use a barometer/low pressure sensor to measure the change in pressure in a tube connecting the sensor to the stem of a plant as the plant undergoes transpiration in still air and then in moving air.
- Students use the analysis tools of the data collection system to determine the change in pressure per unit of time for each condition.
- Students compare the changes in pressure per unit of time (rate of transpiration) for each condition and propose reasons for the changes.
Sensors / Equipment Used:
Measures atmospheric pressure changes and doubles as a low pressure sensor. For use with PASPORT Interfaces.
Allows an additional two meter length extension on all PASPORT sensors.
The Large Base and Support Rod includes built-in leveling screws and an aluminum rod that is 12.7 mm (1/2 in.) in diameter and 45 cm long.
Clamp tubes, rods, and irregularly shaped objects.
The V-shaped, plastic-coated jaws will gently hold a buret and lock at any angle.
Glycerin, 1 mL
Petroleum jelly, 2 to 3 g
Plant seedling, 12 to 15 cm tall
Water, 1 L
Your Bundle Options:
A sensor bundle specifically designed to get you started using probeware in your biology lab. Also: perform 10 of the 24 Lab Activities from Biology with Inquiry.
The Biology Standard Sensor Bundle includes a photosynthesis tank and the sensors required to perform 19 of the 24 Lab Activities in the Biology through Inquiry manual.