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.

Respiration & Carbon Cycle

Lab Summary

Use a carbon dioxide sensor to compare the respiration of dormant bean sees with germinating bean seeds, and to observe the contribution of cellular respiration to the global carbon cycle.

Theory

Students explore the relationships between cellular respiration, photosynthesis, and the carbon cycle by:

  • Analyzing the process of aerobic cellular respiration, particularly the release of CO2, in dormant and germinating seeds.
  • Explaining the contribution of cellular respiration to the global carbon cycle.
  • Recognizing some of the different forms carbon can take.

Method

Students use germinating bean seeds as a model to represent cellular respiration in a closed system, and conduct the following procedures:

  • Observe, sketch, label, and compare the gross morphology of dormant and germinating bean seeds.
  • Use a carbon dioxide sensor to measure and compare the carbon dioxide concentration in the air of a closed system containing first dormant and then germinating bean seeds.

Sensors / Equipment Used:

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.

Materials Used:

Dissecting microscope or magnifying glass
Dry bean seeds - 22
Knife or scalpel 
Parafilm® for Erlenmeyer flask 
Sampling bottle or Erlenmeyer flask, 125-mL - 2

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.