Describe the flow of energy in ecosystems With the aid of the following diagrams, explain the reasons for the shape of a pyramid of energy State the units of measurement used in a . Student responses should reflect a developing understanding of how organisms obtain energy. Student models should show a flow of energy from the sun to their plant as well as the plant . Energy flow in an ecosystem can be shown in a diagram. Look. at the diagram as each step in the flow of energy is described. Energy