In-depth and detailed notes on everything you need to know for AS-Level AQA Geography, the notes can also be used for A-Level however do not include 2nd year material.
,SYSTE
MS If both the inputs and outputs are equal a D
A system comprises any set of inter- EQUILLIBRIUM is reached. If there is not it i
related components that are connected
together to form a working unit. The often as feedback.
have an INPUT, PROCESS and OUTPUT like Positive feedback- They are a cyclical sequen
a computer. All systems are kept within a events that encourage environmental instab
boundary and SHARE these values. one change leads to another driving it in one
direction
CLOSED- Closed systems keep their matter Negative feedback – They are a cyclical sequ
within the system but not their energy
events that promotes stability by neutralisin
OPEN- Transfer both energy and matter effect of a change in the system, if one thing
within the system something happens to cause it to fall again.
ISOLATED- There are no transfers in or out
, COASTAL
LANDFORMS
LANDFORMS – Landforms are specific
geomorphic features on the surface of the
Wind is a primary source of energy for many
processes in a coastal system. It can cause
earth! E.g mountains and hills sediment to move causing abrasion (erosion). The
LANDSCAPE – Part of the earths surface that prevailing wind is the most dominant direction of
can be viewed at one time in only one place the wind in the system, this effects the power of
and are made up of many features and waves on the coast and their direction.
landforms.
WAVES DEPEND ON:
The coastal system is a system of many The fetch – How far has the wind been blowing over
elements linked around coastal landforms the water
affecting coasts through which energy and Strength of the wind –
matter circulated (open). Time it has been blowing
Coastalisation is the process by which coastal area are developed and people move to them, it is se
as a by-product of urbanisation when considering that many central cities are located near coasts.
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