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AQA Physical Geography > Systems > Flashcards

Flashcards in Systems Deck (14)
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1

Define Input

Any material or energy moving into the system from the outside

2

Define Output

Any material or energy moving out of the system from the inside

3

Define Energy

A power (or driving force) in a system

4

Define Stores/Components

The individual elements of a system

5

Define Flows/Transfers

The links between the stores/components of a system

6

Define Positive Feedback

A cycle of events that amplifies change. Positive loops exacerbate outputs, driving a single direction and therefore instability

7

Define Negative Feedback

A cycle of events that contracts change. Negative loops stabilise and equalise a system.

8

Define Dynamic Equilibrium

A state of balance within a constantly changing system.

9

Example of an Input

Water Cycles: precipitation
Carbon Cycles: fossil fuel burning

10

Example of an Output

Water Cycles: percolation
Carbon Cycles: sequestration

11

Example of Energy

Water Cycles: latent heat associated with a changing state of water
Carbon Cycles: production of glucose through photosynthesis

12

Example of a Store/Component

Water Cycles: groundwater
Carbon Cycles: trees

13

Example of a Flow/Transfer

Water Cycles: evaporation
Carbon Cycles: absorption

14

Example of a Positive Feedback Loop

Rising sea levels due to