5-LS2-1 Develop a model to describe the movement of matter among plants, animals, decomposers, and the environment.
Clarification Statement: Emphasis is on the idea that matter that is not food (air, water, decomposed materials in soil) is changed by plants into matter that is food. Examples of systems could include organisms, ecosystems, and the Earth.
Assessment Boundary: Assessment does not include molecular explanations.
This resource was not designed to build towards this performance expectation, but can be used to build towards it using the suggestions provided below.
Comments about Including the Performance Expectation
Students could use the observations collected from the terrarium to construct a model. This model should include the animals, plants, decomposers, and elements of the ecosystem. It should show the relationships between the organisms in terms of what they consume or decompose, and the relationships between the balance within the ecosystem. The model should serve as a tool to help students predict what would happen if the organisms in the system changed in population or if the ecosystem changed.