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A Level Physical Geography > Key Definitions > Flashcards

Flashcards in Key Definitions Deck (14)
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1

Define system

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

2

Define closed system

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

3

Define open system

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

4

Define isolated system

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

5

Define dynamic equilibrium

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

6

Define positive feedback

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

7

Define negative feedback

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

8

Define atmosphere

The blanket of gas surrounding a planet

9

Define biosphere

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

10

Define lithosphere

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

11

Define hydrosphere

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

12

Define Cryosphere

The frozen water part of the earth's system

13

Define cascading system

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

14

Define coast

A natural interface between the land and the sea