Identify examples of open- and closed-looped systems.
The Nature of Science
Systems, Models, and Patterns
Explain the parts of a simple system, their roles, and their relationships to the system as a whole.
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Describe a system as a group of related parts with specific roles that work together to achieve an observed result.
Explain how components of natural and human-made systems play different roles in a working system.
Distinguish between open loop (e.g., energy flow, food web) and closed loop (e.g., materials in the nitrogen and carbon cycles, closed-switch) systems.
Use evidence, observations, or explanations to make inferences about changes in systems over time.
Use evidence, observations, or a variety of scales to describe relationships.