Feedback Loops Quiz
littlejt
Created on November 13, 2023
positive and negative feedback loops
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Transcript
Feedback Loops Quiz
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Negative Feedbacck Loop
Question 1/5
Certain organisms possess internal feedback systems that trigger physiological changes. These mechanisms act to inhibit breeding in response to elevated population densities and, conversely, facilitate breeding when population densities are low.
Positive Feedbacck Loop
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Question 2/5
NegativeFeedbacck Loop
In some developing countries, poverty causes illness and contributes to poor standards of education. In the absence of knowledge of family planning methods and hygiene, this contributes to population growth and illness, adding further to the causes of poverty; “a vicious circle of poverty.”
Positive Feedbacck Loop
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Higher temperatures cause more evaporation which leads to more water vapor in the atmosphere. Water vapor is a greenhouse gas so will trap more heat so the atmosphere will warm more.
Question 3/5
Negative Feedback Loop
Positive Feedback Loop
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PositveFeedback Loop
Question 4/5
Negative Feedback Loop
As the Earth warms, ice cover melts, exposing soil or water. Albedo decreases (albedo is the fraction of light that is reflected by a surface). More energy is absorbed by the Earth’s surface. Global temperature rises. More ice melts.
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Question 5/5
PositiveFeedback Loop
As carbon dioxide levels in the atmosphere rise, the temperature of the Earth rises. As the Earth warms, the rate of photosynthesis in plants increases, more carbon dioxide is therefore removed from the atmosphere by plants, reducing the greenhouse effect and reducing global temperatures.
NegativeFeedback Loop
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