Featured in PASCO’s College Biology Instructor Guide

College Biology Instructor Guide


College Instructor edition with 26 experiments covering introductory and general biology topics.

Plants and Animals

Lab Summary

Use carbon dioxide and oxygen gas sensors to measure changes in gas levels in a terrestrial ecosystem created within a PASCO EcoChamber.



Students explore the relationship between plants and animals in an ecosystem.

  • Students explore the roles of producers, consumers, and decomposers and their effects on the cycling of gases in a closed system, the EcoChamber.
  • Students monitor the concentrations of oxygen (O2) and carbon dioxide (CO2) gas.


Students gain experience conducting the following procedures:

  • Creating a terrestrial ecosystem in an EcoChamber..
  • Measuring changes in O2 and CO2 gas levels in the EcoChamber.
  • Designing and conducting a controlled experiment.

Sensors / Equipment Used:

PASPORT Carbon Dioxide Gas Sensor


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


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.

PASPORT Sensor Extension Cable


Allows an additional two meter length extension on all PASPORT sensors.



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

Materials Used:

Potting soil - 2 to 3 cups
Small animal (Ex. Crickets) - 10
Small plant, variety 

The Associated Bundle:

College Biology Bundle


A complete probeware bundle designed for PASCO's College Biology curriculum

Interface Required

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