Life Science Logo 5th Grade (SCI) Science Standards
[LS2] Ecosystems: Interactions, Energy, and Dynamics

SCI-05.LS2.01 Develop a model to describe the movement of matter among plants, animals, decomposers, and the environment.

Clarification Statement: Examples of systems could include organisms, ecosystems (decay), and the Earth. Consider teaching the carbon cycle, nitrogen cycle, and water cycle. Crop rotation is often due to the amount of nitrogen in the soil. Soybeans and other legumes can pull nitrogen from the air and convert it into a usable form.
Disciplinary Core Ideas
Organisms are related in food webs in which some animals eat plants for food and other animals eat the animals that eat plants. Decomposition eventually restores (recycles) some materials back to the soil. A healthy ecosystem is a balanced ecosystem. Newly introduced species can damage the balance of an ecosystem.
Matter cycles between the air and soil and among plants, animals, and microbes as these organisms live and die. Organisms obtain gases, and water, from the environment, and release waste matter back into the environment.

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