Photosynthesis (bubble counting method) with CobraSMARTsense

Principle

Measurement of the dependence of photosynthesis performance on brightness by counting the number of oxygen bubbles secreted by an aquatic plant.

Tasks

1. study of the dependence of photosynthetic activity by using the bubble counting method in an aquatic plant
2. investigation of the influence of the carbon dioxide content of water on the photosynthesis rate

Learning Objectives

Students should recognise that the rate of photosynthesis depends on light intensity. To demonstrate this, the oxygen bubble counting method is used and learners are familiarised with digital measurement recording for light measurement. Students also recognise that the carbon dioxide content has an influence on the rate of photosynthesis.

Benefits

• Especially understandable and didactically prepared description of the experiment (reference to everyday life etc.) including protocol questions.
• Future-oriented teaching: Integration into digital science lessons with tablets or smartphones.
• Increased motivation of students by using the intuitive measureAPP.
• Increased media competence.
• Compact, easily transportable experimental set-up
• suitable for demo experiments and practical training
• Flexible test execution thanks to wireless data transmission