Mocks - Water and Carbon Cycle Flashcards
what are systems made up of?
- stores
- flows
- boundaries
- inputs
- outputs
what are inputs?
when matter or energy is added to the system
what are outputs?
when matter or energy leaves the system
what are stores?
where matter or energy builds up
what are flows?
when matter or energy moves from one store to another
what are boundaries?
the limits of the system
what are open systems?
both energy and matter can enter and leave
what are closed systems?
matter can’t enter or leave can only cycle between stores, but energy can enter or leave
when is a system in equilibrium?
if the inputs and outputs of a system are balanced
what can cause a change of dynamic equilibrium?
large, long term changes to the balance of inputs and outputs
what can trigger positive and negative feedback?
changes to dynamic equilibrium
what is positive feedback?
the effects of an action are amplified in the inputs or outputs
what is negative feedback?
the effects of an action are nullified in the inputs or outputs
how does the system respond to positive feedback?
increasing the effect of the change, moving the system even further from its previous state
