water and carbon cycles as natural systems Flashcards
what are inputs in a natural water system
when matter or energy is added to the system
e.g. precipitation
what are outputs in a natural water system
when matter or energy is leaves the system
via evaporation
what are stores in a natural water system
where matter or energy builds up
e.g. soil storage
what are flows in a natural water system
when matter or energy moves form one store to another
e.g. channel flow
what is an open water system
a system where both matter and energy are inputs and outputs. this means the amount of matter in the system can change
e.g. drainage basin
what is a closed system
a system where only energy can leave as an input or output. this means the amount of matter in the system stays the same.
e.g. carbon cycle
what is dynamic equilibrium
when the inputs and outputs are balanced on average a system is in dynamic equilibrium
what is positive feedback
When a system amplifies changes in inputs and outputs.
The system responds by increasing the effects of change.
This means the system moves further from its previous state.
what is negative feedback
When a system counteracts changes in inputs and outputs.
The system responds by decreasing the effects of change.
This brings the system closer to its previous state.
