System Vocabulary System: A group of interacting parts that form a whole Subsystem: Smaller systems within the system. The whole system can do things that subsystems can’t do on their own. Input: What goes into a system. Output: What comes out of a system. Boundaries: The conceptual lines that compose a system-these can change depending on the purpose of studying the system. Feedback: The process in which the output of a system provides information used to regulate the operation of a system. Positive Feedback: Increases the disturbance to a system. Negative Feedback: Reduces the disturbance of a system. Equilibrium: Balance within the system. Changing or Equilibrium: Varies or stays the same (constant) Static or Dynamic: Inflows and outflows are equal or not.