Featured in PASCO’s College Biology Instructor Guide
College Instructor edition with 26 experiments covering introductory and general biology topics.
Use a water quality sensor to measure pH changes in a series of simulated closed systems containing various organisms.
In this activity, students investigate the interrelationships that exist between photosynthetic and aerobic organisms. Students explore:
Students gain experience conducting the following procedures:
Aquatic snails - 2
Bromothymol blue solution (in dropper bottle) - 500 mL
De-chlorinated water - 500 mL
Elodea sprigs (or other aquatic plant) - 2 to 4
Large test tubes - 4
Standard Buffer (pH 10) - 25 mL
Standard Buffers (pH 4) - 25 mL
Test tube rack
Test tube stoppers - 4
This experiment may require software and an interface for data collection.