Feedback systems basics

Question 1

Define an Open system

Answer 1

When energy can escape and enter/ inputs and outputs. Matter can enter and leave the system.
For example, a drainage basin.

Question 2

Define a Closed system

Answer 2

Energy can enter and leave the system. However, Matter can not (Enter or exit the system).

Question 3

Define Positive Feedback cycle

Answer 3

There is a change to the system, the changes in the system amplify initial change

Question 4

Define Negative Feedback cycle

Answer 4

Change in the system, resulting effects of the change nullify/dampen the initial change. It brings the system back to dynamic equilibrium.

Since you probably don’t currently know an example, here’s one:

More co2 in atmosphere –> Global temp rise –> Plant growth increase –> Photosynthesis increased, therefore more co2 removed from atmosphere and sequestered.

Question 5

Name the four Stores

Answer 5

-Biosphere
-Cryosphere
-Lithosphere
-Hydrosphere

Question 6

Define:

Inputs

Outputs

Stores

Flows

Answer 6

Inputs are something that enters the system

Outputs are something that exits the system

Stores are where something is held.

Flows are movements between stores.