3.1 - Coasts as natural systems Flashcards Preview

A-Level Geography - Coastal; systems and landscapes > 3.1 - Coasts as natural systems > Flashcards

Flashcards in 3.1 - Coasts as natural systems Deck (16)
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1

Define ecosystem

Interrelationships between living and non-living components within an environment

2

Name 3 characteristics of a system

1. Has a boundary
2. Has inputs and outputs that causes system to change
3. Involves a flow of material between components

3

Name the three types of systems

Open, closed, isolated

4

Describe an open system

Transfers energy and matter across a boundary

5

Describe a closed system

Transfers energy, not matter across a boundary

6

Describe an isolated system

No interaction between the system and it's surroundings

7

Define positive feedback

Process in which the initial change will bring about an additional change in the same direction

8

Positive feedback example

Climate change

9

Define negative feedback

Process in which an initial change brings about an additional change in the opposite direction

10

Negative feedback example

Cattle grazing

11

How many major sediment cells are there in England and Wales?

11

12

Are sediment cells closed or open systems? Why?

Closed - boundaries tend to be headlands and peninsulas which acts as a natural barrier and doesn't tend to have new inputs or outputs

13

3 examples of inputs

Tides, waves, glacial decomposition

14

3 examples of outputs

Coastal landforms, evaporation, sediment eroded by cliffs and transported/deposited elsewhere

15

3 examples of stores

3 examples of stores

16

3 examples of flows/transfers

Wind blown sand, mass movement, LSD