Advanced Environmental and Earth Sciences Teacher Guide

(PS-2979)

Teacher manual for Advanced Environmental and Earth Sciences labs. Has both the printed version and a flash drive with teacher tips, a PDF of teacher version and editable Word student version.

Photosynthesis & Productivity

Lab Summary

Use a dissolved oxygen sensor to determine the primary productivity of an aquatic plant.

Theory

Students determine the primary productivity of an aquatic plant.

Downloads

  • Sample Lab - Photosynthesis and Primary Productivity (764 KB – PDF)
  • Method

    Students will gain experience conducting the following procedures:

    • Use a dissolved oxygen sensor to measure the rate of change in dissolved oxygen concentrations in a closed chamber while exposing an Elodea plant to bright light and in darkness.
    • Calculate the net primary productivity (NPP) rate, cellular respiration (R) rate, and gross primary productivity (GPP) rate.
    • Estimate the total GPP, R, and NPP of the Elodea plant if maintained in the experimental condition for 24 hours.

    Sensors / Equipment Used:

    Advanced Water Quality Sensor

    (PS-2230)

    MultiMeasure sensor that incorporates pH, conductivity, temperature, and the optical dissolved oxygen probe.

    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:

    Black cloth, opaque, 50 cm x 50 cm 
    Dechlorinated tap water - 1 L
    Elodea sp. plant - Several
    Lamp, 100 W or high-intensity 
    Magnetic stirrer and stir bar 
    Alternative to the photosynthesis tank:
    Erlenmeyer flask, 250-mL 
    Large base and support rod 
    Mineral oil 
    Shallow pan or dish, large 
    Three-finger clamp 

    Your Bundle Options:

    Option 1:

    Advanced Environmental and Earth Science Starter Sensor Bundle

    (PS-2915A)

    Starter Sensor bundle designed for use with Advanced Environmental and Earth Sciences Solutions.

    Option 2:

    Advanced Environmental and Earth Science Standard Sensor Bundle

    (PS-2916A)

    Standard bundle for Advanced Environmental and Earth Sciences Teacher Guide,

    Interface Required

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