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Flashcards in water cycle system framework Deck (19)
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1
Q

what is a system?

A

a set of interrelated components that work together towards some kid of process

2
Q

what are systems a series of?

A

stores, components and flows

3
Q

what are the three types of properties of s system?

A

elements
attributes
relationships

4
Q

what are elements?

A

things that make up the system

5
Q

what are attributes?

A

perceived characteristics of the elements

6
Q

what are relationships?

A

descriptions of how elements work together towards some kind of process

7
Q

what are common characteristics of a system?

A
  • structure lies within a boundary
  • function by having inputs and outputs
  • involve a flow of material between components
8
Q

what are the ways systems can be classified?

A

open
closed
isolated

9
Q

what is an open system?

A

where matter and energy can be transferred from the system across the boundary into the surrounding environment

10
Q

what is a closed system?

A

have transfer of energy to the surrounding environment but not a transfer of matter

11
Q

what is an isolated system?

A

no interaction with anything outside the system boundary, no input or output of energy or matter
very rare in nature

12
Q

when is a system in a state of dynamic equilibrium?

A

when there is a balance between inputs and outputs

stores stay the same

13
Q

how is equilibrium upset

A

if one element of the system changes, if input changes without corresponding change from output

14
Q

what are the two types of feedback?

A

positive and negative

15
Q

what is positive feedback?

A

where the effects of an action are amplified by secondary effects

16
Q

what is negative feedback?

A

where effects of an action are nullified by secondary effects

17
Q

what kind of system is the earth as a whole?

A

closed system, movement of energy but not matter

18
Q

what are the four subsystems inside the earth?

A

atmosphere, lithosphere, hydrosphere, biosphere

19
Q

why are the subsystems called a cascading system?

A

they are open systems that form part of a chain