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MS-LS2-5

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MS-LS2-5 Ecosystems: Interactions, Energy, and Dynamics
Students who demonstrate understanding can: Evaluate competing design solutions for maintaining biodiversity and ecosystem services.*
Clarification Statement: Examples of ecosystem services could include water purification, nutrient recycling, and prevention of soil erosion. Examples of design solution constraints could include scientific, economic, and social considerations.
Assessment Boundary: N/A
Crosscutting Concepts	Science & Engineering Practices	Disciplinary Core Ideas
Stability and Change: Small changes in one part of a system might cause large changes in another part.	Engaging in Argument from Evidence: Engaging in argument from evidence in 6–8 builds on K– 5 experiences and progresses to constructing a convincing argument that supports or refutes claims for either explanations or solutions about the natural and designed world(s). Evaluate competing design solutions based on jointly developed and agreed-upon design criteria.	Ecosystem Dynamics, Functioning, and Resilience: Biodiversity describes the variety of species found in Earth’s terrestrial and oceanic ecosystems. The completeness or integrity of an ecosystem’s biodiversity is often used as a measure of its health. Biodiversity and Humans: (secondary to MS-LS2-5) Changes in biodiversity can influence humans’ resources, such as food, energy, and medicines, as well as ecosystem services that humans rely on—for example, water purification and recycling. Developing Possible Solutions: (secondary to MS-LS2-5) There are systematic processes for evaluating solutions with respect to how well they meet the criteria and constraints of a problem. Influence of Engineering, Technology, and Science on Society and the Natural World: The use of technologies and any limitations on their use are driven by individual or societal needs, desires, and values; by the findings of scientific research; and by differences in such factors as climate, natural resources, and economic conditions. Thus technology use varies from region to region and over time.