
Description: 
In prior grades students learned how to simplify and analyze complex situations by thinking about them as systems. In grades 912 students learn to construct more sophisticated system models, including the concept of feedback. Students are expected to determine whether or not systems analysis will be helpful in a given situation and if so, to describe the system, including subsystems, boundaries, flows, and feedbacks. The next step is to use the system as a dynamic model to predict changes. Students are also expected to recognize that even the most sophisticated models may not accurately predict how the real world functions. This deep understanding of systems and ability to use systems analysis is an essential tool both for scientific inquiry and for technological design. 



Students are expected to:    Analyze whether or not a system (e.g., population) is changing or in equilibrium. *c    Determine whether a state of equilibrium is static or dynamic (e.g., inflows equal outflows). *c  Mathematics Connections    *c A1.8.H Use inductive reasoning about algebra and the properties of numbers to make conjectures, and use deductive reasoning to prove or disprove conjectures. A1.7.C Express arithmetic and geometric sequences in explicit and recursive forms, translate between the two forms, explain how rate of change is represented in each form, and use the forms to find specific terms in the sequence. 



