Ford Test: Feedback Loops/
Biogeochemical Cycles Question and
answers 100% correct
Positive Feedback - correct answer ✔Amplifies a particular effect or change
from previous conditions
Positive feedback example... - correct answer ✔Plants grow. --> Those
plants die and decompose forming humus which enriches the soil. --> This
allows for an increase in plant growth
Example of harmful positive feedback: - correct answer ✔A forest is
removed...this land becomes very susceptible to erosion
Negative Feedback - correct answer ✔Diminishes or counteracts changes in
an ecosystem to maintain a more stable balance
Negative feedback example... - correct answer ✔A certain type of predator
depletes a source of prey, which in turn depletes that source of predator. With
less predators around, that source of prey increases once again, and the
cycle restarts
How many feedback loops are possible in a food web of 20 species? - correct
answer ✔Thousands
True or False
Feed back loops work completely independently of one another. - correct
answer ✔False
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