Featured in PASCO’s College Biology Instructor Guide
College Instructor edition with 26 experiments covering introductory and general biology topics.
Use a barometer to explore the effects of environmental factors, such as air movement, on the rate of transpiration in a plant.
Students observe the rate of transpiration in a plant and then test the effects of various environmental factors on that rate. Students also observe the differences between monocot and dicot stems and relate their structure to their functions.
Students gain experience conducting the following procedures:
100-watt light source
Compound light microscope
Dicot stem prepared slide
Electronic Balance - 1 per class
Glycerin - A few drops
Heat sink (large beaker or aquarium filled with water)
Knife or single-edge razor blade
Large Base and Support Rod
Monocot stem prepared slide
Petroleum jelly - 2 to 3 g
Plant seedlings, 12-25 cm tall
Spray bottle with water
Transparent plastic bag
Wide, shallow bowl or tub filled with water
This experiment may require software and an interface for data collection.