Photosynthesis and cellular respiration are the fundamental processes in the flow of energy and the cycling of matter. Students are given the task of building models of water and carbon dioxide molecules, which are converted into glucose and oxygen molecules at the giant chloroplast.  The glucose and oxygen molecules then move to the mitochondria where the students reassemble them into carbon dioxide and water molecules, generating ATP.

Modeling Activity for Photosynthesis and Cellular Respiration