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A Level Physical Geography > Key Definitions > Flashcards

Flashcards in Key Definitions Deck (14)
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1
Q

Define system

A

A set of interrelated components working together towards some kind of process

2
Q

Define closed system

A

These have transfers of energy both into and beyond the system boundary, but no transfer of matter

3
Q

Define open system

A

These have transfers of energy and matter from the system boundary into the surrounding environment

4
Q

Define isolated system

A

These have no interaction with anything outside of the system boundary.
There is no input or output of energy or matter.

5
Q

Define dynamic equilibrium

A

Where there is a balance between the inputs and outputs in a system

6
Q

Define positive feedback

A

Where the effects of an action are amplified / multiplied by its subsequent knock on effects

7
Q

Define negative feedback

A

Where the effects of an action are cancelled out by its subsequent knock on effects

8
Q

Define atmosphere

A

The blanket of gas surrounding a planet

9
Q

Define biosphere

A

The space on or near the earth’s surface that contains living organisms / supports life

10
Q

Define lithosphere

A

The solid outermost part of the earth -> brittle upper mantel, crust.

11
Q

Define hydrosphere

A

All the waters on, below or above the earth’s surface

12
Q

Define Cryosphere

A

The frozen water part of the earth’s system

13
Q

Define cascading system

A

The interlinking of multiple components to form a larger system.
Eg earth’s major subsystems are interlinked -> cascading system.

14
Q

Define coast

A

A natural interface between the land and the sea