# Shared Flashcard Set

## Details

Geography 106
An Introduction to systems
25
Geography
02/10/2013

Term
 How do we describe earth?
Definition
 Earth is a system that consist of linked components
Term
 What are Components?
Definition
 Objects that are distinct from other objects
Term
 Distinctions between components are _____________?
Definition
 Subjective ex: is there a defined break between nose and face?
Term
 Can comonents contain other components?
Definition
 Yes. ex: earth is a component of the solar system yet it constains individual components with in it
Term
 What is a state?
Definition
 A components attribute ex: how will we mesure the component
Term
 What does a system consist of?
Definition
 2 components which are linked occurs because one affects the other component
Term
 what is a pertubation?
Definition
 This disturbs the state of a component. ex: A crooked nose after being broken
Term
 What does a systems diagram use to show linkage?
Definition
 couplings
Term
 when do couplings occur?
Definition
 When changing one state affects the state of another component ex: change in temp affects the temp of my nose
Term
 Positive coupling
Definition
 increse in one component increases the other component or a decrease of one decreases the other
Term
 negative coupling
Definition
 an increase in one component decreases the other
Term
 What example did professor larsen use in class for couplings?
Definition
 car and proximity
Term
 When does a feedback system occur?
Definition
 This occurs when the components of a system are linked in a circular manner
Term
 What does an arrow represent? an open circle?
Definition
 Arrow shows positive coupling circle shows negative coupling
Term
 Negative feedback systems
Definition
 two or more components are coupled in a liip and there is an odd number of negative couplings
Term
 Positive feedback system
Definition
 if two or more componets are coupled in a loop, and they are either all positive or an even umber of positive and negative couplings
Term
 Equillibrium state of attribute
Definition
 states that ten to be maintianed over time
Term
 Stable Equlibrium States SES
Definition
 this is a state that is maintained even after pertubation Ex: ball in a valley if it is pushed up hill it will everntually return back to its SES
Term
 Unstable Equilibrium States UES
Definition
 this is a state lost after pertubation Ex: ball on a peak if it is hit it will not return back to the peak... it will have gone from SES on the peak to SES in the valley... in reality it is UES
Term
 How do you Graph these relationships?
Definition
 showing relations between states of two components independent varialbe (cause) on X axis Dependent (effect) on Y axis
Term
 Positive slope
Definition
 as the independent increases the dependent increases as well
Term
 Negative slope
Definition
 as the independent increases the dependent decreases
Term
 Parabolic
Definition
 Strong positive to weak positive equilibrium weak negative  strong negative
Term
 What example did Professor Larsen use to describe parabolic relationships?
Definition
 Plant growth and the amount of water in the soil.. the pertubation: adding or decreasing water supply affects the height to much water it dies to little it dies it is perfect at equilibrium or the peak of the parabolic graph
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