Geographical systems and models

Question 1

Positive feedback

Answer 1

Effects of an action are amplified by secondary effects.

Question 2

Negative feedback

Answer 2

Effects of an action are nullified by subsequent effects.

Question 3

System

Answer 3

An assemblage of interrelated parts that work together by way of some driving force.

Question 4

Elements

Answer 4

Physical objects existing in a system

Question 5

Attributes

Answer 5

Characteristics of the elements that can be perceived and measured e.g. mass or temperature

Question 6

Relationship

Answer 6

The associations between elements and attributes based on cause and affect

Question 7

Closed system

Answer 7

System where there is no gain or loss of matter, only energy is transferred between the system and its surroundings. e.g. global hydrological cycle

Question 8

Open system

Answer 8

A system where both matter and energy can be transferred between the system and its surroundings e.g. hydrological cycle in a drainage basin

Question 9

Isolated system

Answer 9

Neither matter nor energy can enter or leave the system only e.g. entire universe

Question 10

Dynamic Equilibrium

Answer 10

Dynamic equilibrium refers to the maintenance of a balance in a natural system, despite it being in a constant state of change. The system has a tendency to counteract any changes imposed on the system in order to keep this balance, which is achieved by inputs and outputs constantly changing to maintain the balance