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The Yin and Yang of Photosynthesis: Day vs. Night Lesson Overview

Students will use this model to experiment how changing the condition for photosynthesis affects the photosynthetic products.


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50 Minutes
Laboratory or Classroom
2 students
PTI Inquiry
1.1, 1.3, 2.1, 3.1, 3.2, 3.3, 3.7, 4.3, 5.2, 5.3, 5.9, 7.1, 7.2
Lesson Components Time Inquiry Skills Tech. Used Engage Level Brief Description
Engage 5 min 1.1, 1.3, 2.1 Blackboard, overhead, etc. 2 As a class, draw out a visual model of the photosynthetic process on the blackboard, etc. A series of probing questions (Appendix A) can be asked to the class to make sure that all relevant factors are included.
Explore 20 min 2.1, 3.1, 3.2, 3.3, 3.7, 4.3 Lab equipment specified in materials 3 Students will design an experiment to measure oxygen production from photosynthesis. Students will measure how much oxygen has been produced by the lab set up (high light vs. low/no light) over the specified time frame. Data will be collected, plotted on a graph, and compared among the class.
Explain 5 min 4.3, 5.2, 5.3, 7.1, 7.2 none 3 Students will work in pairs and answer a series of questions explaining what occurred during the experiment. (What gas was increasing, what was decreasing, etc?)
Expand 10 min 5.9 none 2 Students discuss what they think would happen in situations where other photosynthetic variables changed like temperature, carbon dioxide availability, etc.)
Evaluate 10 min   none 1  

Level of Student Engagement
1     Low     Listen to lecture, observe the teacher, individual reading, teacher demonstration, teacher-centered instruction
2     Medium     Raise questions, lecture with discussion, record data, make predictions, technology interaction with assistance
3     High     Hands-on activity or inquiry; critique others, draw conclusions, make connections, problem-solve, student-centered

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