Systems in physical geography Flashcards

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1
Q

What is a flow or transfer?

A

a link between stores through the movement of energy or mass

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2
Q

What is an input in a system?

A

addition of energy or matter into a system

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3
Q

What are isolated systems?

A
  • have no interactions with anything outside the system boundary
  • no input of energy or matter
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4
Q

Are isolated systems realistic in nature?

A

no, mostly in laboratory experiments

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5
Q

What are closed systems?

A
  • have transfers of energy both into and out of the system

- no transfer of matter

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6
Q

What is an open system?

A
  • matter and energy are transferred across the system boundary
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7
Q

What type of system are most ecosystems?

A

open systems

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8
Q

What is dynamic equilibrium?

A

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

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9
Q

What is positive feedback?

A
  • where the effects of an action are amplified
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10
Q

What is negative feedback?

A
  • where the effects of an action are nullified
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