Featured in PASCO’s College Environmental Science Instructor Guide

College Environmental Science Instructor Guide

(PS-3809A)

College Instructor edition with experiments covering introductory and general environmental science topics.

Photosynthesis & Respiration

Lab Summary

Use an oxygen sensor, a carbon dioxide sensor, and a temperature sensor to demonstrate that a terrarium, as a closed system, is an excellent tool for conducting environmental studies and to design additional investigations on photosynthesis and cellular respiration.

Theory

Students demonstrate that a terrarium, a closed system, is an excellent tool for conducting environmental studies such as determining the rates of photosynthesis and cell respiration in plants. As part of this process, students:

  • Learn to use this closed system to change one variable at a time, control other variables, and monitor multiple variables.
  • Design additional investigations on photosynthesis and cellular respiration using the terrarium.

Method

Students gain experience conducting the following procedures:

  • Designing controlled investigations.
  • Identifying the causes of the changes in the rates of O2 and CO2 gas concentration shown on the graphed results of these measurements.
  • Using sensor technology to monitor independent and dependent experimental variables.

Sensors / Equipment Used:

PASPORT Water Quality Sensor

(PS-2169)

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.

PASPORT Carbon Dioxide Gas Sensor

(PS-2110)

The PASPORT Carbon Dioxide Gas Sensor measures carbon dioxide concentration CO2 (parts per million) in gases such as air. Ideal for studies of photosynthesis, respiration, fermentation and more.

PASPORT Oxygen Gas Sensor

(PS-2126A)

The Oxygen Gas Sensor accurately measures O2 concentration in the atmosphere or in enclosed spaces. Study animal, plant or cellular respiration, air quality, O2 production from chemical reactions and more.

EcoChamber

(ME-6667)

A single acrylic chamber designed to integrate sensors for controlled-environment experiments such as fermentation and plant or cricket respiration.

Materials Used:

Fast-growing, small, potted plant 
Opaque cloth, about 1 m2 
Strong incandescent or full spectrum fluorescent light source
USB hub (depending on data collection system)

The Associated Bundle:

College Environmental Science Sensor Bundle

(PS-2930A)

Contains the probeware needed to perform all 26 experiments in the College Environmental Science instructor guide.

Interface Required

This experiment may require software and an interface for data collection.