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C1.3.7—Techniques for varying concentrations of carbon dioxide, light intensity or temperature experimentally to investigate the effects of limiting factors on the rate of photosynthesis

Experiments

Here are experiments our science specialists have selected to support this IB* topic.

Investigating Primary Productivity

Experiment #17 from Investigating Biology through Inquiry

In this Preliminary Activity, you will gain experience using a Dissolved Oxygen Probe as you measure the DO level of a water sample provided by your teacher. You will also learn how to calculate respiration rate, gross productivity, and net productivity using the light and dark bottle method.

After completing the Preliminary Activity, you will first use reference sources to find out more about primary productivity before you choose and investigate a researchable question dealing with primary productivity. Some topics to consider in your reference search are:

  • primary productivity
  • dissolved oxygen
  • net productivity
  • gross productivity
  • photosynthesis
  • cellular respiration
  • respiration rate
  • eutrophication

Educational Standard
International Baccalaureate (IB) 2025
Subject
Biology
Theme
C Interactions and interdependence
Level of organization
1 Molecules
Topic
C1.3 Photosynthesis
Section
Standard level and higher level

* The IB Diploma Program is an official program of the International Baccalaureate Organization (IBO) which authorizes schools to offer it. The material available here has been developed independently of the IBO and is not endorsed by it.

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