Systems in physical geography Flashcards
1
Q
What is a flow or transfer?
A
a link between stores through the movement of energy or mass
2
Q
What is an input in a system?
A
addition of energy or matter into a system
3
Q
What are isolated systems?
A
- have no interactions with anything outside the system boundary
- no input of energy or matter
4
Q
Are isolated systems realistic in nature?
A
no, mostly in laboratory experiments
5
Q
What are closed systems?
A
- have transfers of energy both into and out of the system
- no transfer of matter
6
Q
What is an open system?
A
- matter and energy are transferred across the system boundary
7
Q
What type of system are most ecosystems?
A
open systems
8
Q
What is dynamic equilibrium?
A
when there is a balance between the inputs and outputs in a system
9
Q
What is positive feedback?
A
- where the effects of an action are amplified
10
Q
What is negative feedback?
A
- where the effects of an action are nullified
