In this minds-on activity, students analyze the relationships between photosynthesis, cellular respiration, and the production and use of ATP. Students learn that sugar molecules produced by photosynthesis are used for cellular respiration and for the synthesis of other organic molecules. Thus, photosynthesis contributes to plant metabolism and growth. The optional final section challenges students to explain observed changes in biomass for plants growing in the light vs. dark. (NGSS)
We do not have a key for this activity, but I believe that the information in "Cellular Respiration and Photosynthesis – Important Concepts, Common Misconceptions and Learning Activities () should make it relatively easy to prepare a key. In addition, you may want to consult a good introductory textbook, since the information needed is generally covered in introductory biology textbooks. If you have any additional specific questions, please let me know and I will be happy to answer your questions.