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2.9 Photosynthesis

Experiments

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

Recommended

Photosynthesis and Respiration (CO2 and O2)

Experiment #31C from Biology with Vernier

In this experiment, you will

  • Use an O2 Gas Sensor to measure the amount of oxygen gas consumed or produced by a plant during respiration and photosynthesis.
  • Use a CO2 Gas Sensor to measure the amount of carbon dioxide consumed or produced by a plant during respiration and photosynthesis.
  • Determine the rate of respiration and photosynthesis of a plant.

Photosynthesis and Respiration (CO2)

Experiment #31B from Biology with Vernier

In this experiment, you will

  • Use a CO2 Gas Sensor to measure the amount of carbon dioxide consumed or produced by a plant during respiration and photosynthesis.
  • Determine the rate of respiration and photosynthesis of a plant.

Photosynthesis and Respiration (O2)

Experiment #31A from Biology with Vernier

In this experiment, you will

  • Use an O2 Gas Sensor to measure the amount of oxygen gas consumed or produced by a plant during respiration and photosynthesis.
  • Determine the rate of respiration and photosynthesis of a plant.

RecommendedInquiry

Transpiration of Plants

Experiment #13 from Investigating Biology through Inquiry

In this Preliminary Activity, you will use a Gas Pressure Sensor to measure transpiration rates under different conditions. The data will be collected by measuring pressure changes as the plant takes up water into the stem.

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

  • transpiration
  • cohesion-tension theory
  • water potential
  • osmosis
  • stomata
  • water potential gradient
  • xylem
  • mesophyll cell

RecommendedInquiry

Plant Pigments

Experiment #14 from Investigating Biology through Inquiry

In this Preliminary Activity, you will use a SpectroVis Plus spectrophotometer to determine and analyze the visible light absorbance spectrum of spinach extract. You will also determine and analyze the fluorescence spectrum of the same spinach extract sample. In fluorescence spectroscopy, a sample can be “excited” with a chosen wavelength of light and the resulting fluorescence from the sample can be measured and quantified.

After completing the Preliminary Activity, you will first use reference sources to find out more about plant pigments, visible light spectra, and fluorescence before you choose and investigate a researchable question dealing with visible light spectra and/or fluorescence spectra of plant pigment. Some topics to consider in your reference search are:

  • plant pigment
  • visible light
  • spectrophotometer
  • visible light spectrum
  • chlorophyll
  • carotenoids
  • anthocyanin
  • fluorescence

Inquiry

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

The light and dark bottle method of measuring oxygen production

Primary Productivity

Experiment #25 from Biology with Vernier

In this experiment, you will

  • Measure the rate of respiration in an aquatic environment using a Dissolved Oxygen Probe.
  • Determine the net and gross productivity in an aquatic environment.

Educational Standard
International Baccalaureate (IB)
Subject
Biology
Section
Core
Topic
2. Molecular biology

* 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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