1. Summary

Feedback loop is compared to a band playing together, each instrument contributing to the feed back of the music.  Feed back is output of matter and energy being fed back into the system as input and makes changes in that system. For example, cycle of predator and prey populations where an increase in prey population will provide more food for predators, increasing predator numbers. This will lead to over predation, and the prey populations will decrease. Example of this is explained in the video.

 

2. Why watch this video?

Identify three key questions that the video answers.

1. Have you ever wondered …?
What is Feedback?

 

2. Would you like to know how [something works or happens/ happened]?
Easier way to understand positive and negative feedback

 

3. Have you ever been confused by …?
Feedback loops

 

3. Key terms

Identify three terms that are technical in nature, and that are key to understanding the topic of the video and define them in simple language.

Term Definition
Feedback occurs when outputs of a system are routed back as inputs as part of a chain of cause-and-effect that forms a circuit or loop
Positive Feedback enhance or amplify changes; this tends to move a system away from its equilibrium state and make it more unstable
Negative Feedback tend to dampen or buffer changes; this tends to hold a system to some equilibrium state making it more stable

 

4. Loose ends

Identify three “loose ends,” and explain the loose ends so that others watching the video will not be confused by them.

Loose end #1: Mutual Casual interaction- means x affects y, and y affects x. this is an example of on-going process, called a feedback loop.
Loose end #2: Food web- represents feeding relationships within a community. It also implies the transfer of food energy from its source in plants through herbivores to carnivores.
Loose end #3:

 

5. Self-Test Questions

Write five multiple choice questions so students can test their knowledge after watching the video. Supply the correct answers and an explanation of why the answers are correct and/or why the other answers are wrong.

Question 1

Question: What is a feedback loop?
Answer a: enhance or amplify changes
Answer b: a chain of cause-and-effect that forms a circuit or loop
Answer c: tend to dampen or buffer changes
Answer d: represents feeding relationships within a community
What’s the answer and why?
B: feedback loop is a loop or circuit in a chain of cause-and-effect

 

Question 2

Question: What is positive feedback?
Answer a: represents feeding relationships within a community
Answer b: a chain of cause-and-effect that forms a circuit or loop
Answer c: tends to move a system away from its equilibrium state and make it more unstable
Answer d:
What’s the answer and why?
C: in a positive feedback, the system is unstable

 

Question 3

Question: What is a negative feedback?
Answer a: enhance or amplify changes
Answer b: Tend to dampen or buffer changes; this tends to hold a system to some equilibrium state making it more stable
Answer c: represents feeding relationships within a community
Answer d:
What’s the answer and why?
A: system is more stable

 

Question 4

Question: What is the interaction between Mutual Casual Interaction and Feedback Loop?
Answer a: a chain of cause-and-effect that forms a circuit or loop
Answer b: X affects Y, and Y affects X creates an ongoing feedback loop in the environment
Answer c: represents feeding relationships within a community
Answer d:
What’s the answer and why?
B: X and Y interact with each other, just like negative and positive loops interacting with each other

 

Question 5

Question: Does positive and negative feedback mean it is good or bad?
Answer a: Yes, it is good and bad
Answer b: No, it means it means they are bigger or smaller
Answer c:
Answer d:
What’s the answer and why?
B: change is bigger or smaller in the environment

 

Shared by: Anonymous

Item Credit: ted talk- Anje-Margriet Neutel

Reuse License: YouTube Standard License

Copy/Paste Text Attribution

Copy/Paste HTML Attribution