Systems

• What are Inputs in a system?

  Where matter or energy is added to the system
• What are Outputs in a System?

  Where matter or energy leaves the system
• What are Stores in a System?

  Where matter or energy builds up in the system
• What are Flows in the System?

  Where matter or energy moves in the system
• What are Boundaries in the System?

  Limits to the system (e.g. watershed)
• What are the differences between Open & Closed Systems?

  • Open Systems receive inputs and transfer outputs of energy & matter with other systems
  • Closed Systems are when energy inputs = outputs
• What is Dynamic Equilibrium?

  When there is a change to the balance of a system, the system shifts to counteract the change to maintain balance. Inputs equal outputs
• What is the differences between Positive & Negative feedback?

  • Positive feedback: When a change to the system results in further change with a similar effect
  • Negative feedback: A change to an input/output that restores balance
• What Systems are the Water & Carbon Cycles ?

  • On a local scale, both cycles are open systems
  • On a global scale, both cycles are closed systems