Water Flashcards
What are the components of a system ?
Inputs
Outputs
Positive feedback
Negative feedback
Boundary
Elements
Attributes
Flows and transfers
Stores and components
Relationship
Open system
Closed system
Isolated system
Cascading system
Model
System
Cycle
What does input mean ?
Elements entering the system.
What does output mean ?
Elements leaving the system.
What is positive feedback ?
When the effects of an action is amplified by other knock on events.
What is negative feedback ?
When the effects of an action is nullified by other knock on events.
What does boundary mean ?
The edge of a system.
What does elements mean ?
Parts and substances that make up a system.
What does attributes mean ?
Characteristics of elements that can be perceived and measured
What does flows and transfers mean ?
Elements moving around a system.
What does stores and components mean ?
Elements being stored in a system.
What does relationship mean ?
Association which occurs between elements and attributed.
What is an open system ?
Inputs and outputs transferring energy and matter across a boundary.
What is a closed system ?
There are no inputs or outputs to the system. Matter is stored in the system, but energy may enter or exit.
What is a isolated system ?
A system where there are no interactions beyond its boundary.
What is a cascading system ?
A chain of open systems where the output of one system creates the inputs for another system.
What does model mean ?
A way of simplifying or representing a complex reality.
What does system mean ?
A model which helps explain relationships within a unit. It consists of a number of components all linked together.
What does cycle mean ?
A continuous system.
How much water is in oceans ?
97 %
How much water is fresh ?
3 %
How much water is surface water ?
1 %
What is the size and distribution of the major stores of water?
What are the processes driving change in the magnitude of these water stores?
How does the magnitude of water stores vary over time and space?
