Featured in PASCO’s College Biology Instructor Guide
College Instructor edition with 26 experiments covering introductory and general biology topics.
Elodea and Snail
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:
- The processes of cellular respiration and photosynthesis.
- The interdependence of respiration and photosynthesis.
- How oxygen molecules cycle through respiration and photosynthesis.
Students gain experience conducting the following procedures:
- Modeling environmental changes using an aquatic snail and an aquatic plant.
- Using the pH probe to measure pH changes in a series of simulated closed systems containing various organisms.
Sensors / Equipment Used:
Measures temperature, conductivity, pH/ISE/ORP and dissolved oxygen. It is specifically designed for convenience in conducting water quality lab experiments. For use with PASPORT Interfaces.
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
The Associated Bundle:
A complete probeware bundle designed for PASCO's College Biology curriculum