The arrows illustrate one possible energy path in an ecosystem, from sun to seaweed to iguana.

In this lesson, students will research matter cycles in various ecosystems. They will develop a model that will show the movement of matter among plants, animals, decomposers, and the environment. Students will choose between a variety of ways to create their model.  (Preview Image: “Food web nemo”, CC-BY-SA 4.0, from Wikimedia Commons)