3.1.1.1 systems Flashcards
Inputs definition
Points where matter or energy enter the system
Outputs
Points where matter or energy leave the system
Stores
Or components
Where matter or energy build up in the system
Flows
Or transfers
Where matter or energy moves in the system
Positive feedback
Chain of events that amplify the original event. Increases instability.
Negative feedback
Chain of events that nullify the original event. Decreases instability.
Dynamic equilibrium
Where inputs equal outputs
Boundaries
The limits of a system e.g. watershed
Open system
Matter and energy can transfer in and out
Closed system
Matter can’t transfer in and out (energy can)
Are and carbon and water cycle open or closed systems?
Open on a local scale but closed on a global scale
Systems models show
Components of 1 aspect of geography and how these components are linked through transfers
Isolated system
No inputs or outputs. Rare in nature
Example of an open system
The drainage basin system
cascading system
Transfer of matter or energy so the output of one system becomes the input of the next
