Assemblage of parts and their relationships forming a functioning whole.
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Open system
Exchanges energy and matter. Most systems are open. All ecosystems are open.
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Closed system
Exchanges neither energy nor matter. Rare in nature and most examples are artificial, constructed for experimental purposes.
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Isolated system
Exchanges energy but not matter. Does not exist naturally - is hypothetical - though it is possible to think of the entire universe as an isolated system.
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Systems diagrams
Represents storages (rectangular boxes) and flows (arrows with the arrow indicating direction of flow).
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Transfers
A change in location.
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Transformations
A change in the chemical nature, a change in state or a change in energy.
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Model
Simplified version of reality and can be used to understand how a system works and predict how it will respond to change. Inevitably involves some approximation and loss of accuracy.
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Other cards in this set
Card 2
Front
Exchanges energy and matter. Most systems are open. All ecosystems are open.
Back
Open system
Card 3
Front
Exchanges neither energy nor matter. Rare in nature and most examples are artificial, constructed for experimental purposes.
Back
Card 4
Front
Exchanges energy but not matter. Does not exist naturally - is hypothetical - though it is possible to think of the entire universe as an isolated system.
Back
Card 5
Front
Represents storages (rectangular boxes) and flows (arrows with the arrow indicating direction of flow).
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