Lesson 15 - Feedback Flashcards
1
Q
What is positive feedback?
A
Factor within system changes
Results in permanent long term change
2
Q
What is negative feedback?
A
Factor changes within system
System operates to revert back to its original state
3
Q
Give an example of negative feedback
A
CO2 conc increases plant growth
Plants sequester CO2
Concentration reduced
Slows warming
4
Q
Give an example of positive feedback
A
Increasing CO2 melts permafrost
Permafrost releases methane
Methane 5x CO2 strength
Furthers warming + melting
5
Q
Why does feedback contribute to future uncertainty?
A
Difficult to predict how systems will respond
Might balance out damages
Might contribute to damages
