Studied by 1 person
flow/transfer
a form of linkage between one store/component and another that involves movement of energy or mass
input
the addition of matter and or energy into a system
output
the results of the processes within a system
store/component
a part of the system within a system
system
a set of interrelated components working together towards some kind of process
elements
things that make up the systems of interest
attributes
the percieved characteristics of the elements
relationships
descriptions of how various elements and their attributes work together to carry out some kind of process
isolated systems
these have no interactions with anything outside the system boundary
no input or output
closed systems
these have transfers of energy both into and beyond the system boundary but not transfer of matter
open systems
these are where matter and energy can be transferred from the system across the boundary into surrounding environment
dynamic equilibrium
there is a balance between inputs and outputs in an open system over time a change to one element in an open system can result in a change to a related element
positive feedback
where the effects of an action are amplified by subsequent knock on effect
negative feedback
where the effects of an action are nullified by its subsequent knock on effects
example of positive feedback
global temperatures rise - warms the oceans
increased oceanic temperature -warm water less able to dissolve gas
Dissolved CO2 released by warmer oceans -CO2 back into the atmosphere
more CO2 in the atmospheric temperatures rise
examples of negative feedback
increase in atmospheric co2-global temperatures increase
more plant growth-increase take up of co2
reduces atmospheric co2-reduced co2 has a dampening affect and reduces global temperatures
cascading system
open systems forming a chain
latent heat
energy requires for a change pf state
absorbed or released
fusion
melting-abosrbing more heat from sun
freezing-latent heat is transferred back into the atmosphere
sublimation
sublimation/deposition
how can a system framework be applied to the water cycle?
it breaks down into elements and their attributes to show their relationships
it simplifies relationships between components allowing improved understanding
for example, precipitation is a flow, moving water from the atmosphere store to the hydrosphere store
it allows us to distinguish between the water cycle as a closed system and an open system within it e.g drainage basin
how is hydrological cycle a closed system
becasue energy can cross the boundary e.g insolation in and radiation out but matter cannot cross the boundary
how is a drainage basin an open system
it recieves inout of matter and energy from the outside of the system and outputs from the system e.g insolation and precipitation in ,water and evaporation out
Note 
Flashcard (42)