Please answer the following questions below:

Read each of the examples below, and indicate which is anexample of positive feedback and which isan example of negative feedback. Alsoprovide at least one example of a threshold that might be observedwithin the system as it is described.

Feedback Type	Process
Positive:       _______ Negative:     _______	1. When a human’s body temperature increases beyond 98.6 ºF, itnormally releases water through the pores. As this water isevaporated, the transfer of latent heat reduces temperature at theskin surface. THRESHOLD:
Positive:       _______ Negative:     _______	2. When a human’s body temperature decreases below 98.6 ºF, thebody metabolizes stored food, raising the temperature of thebody. THRESHOLD:
Positive:       _______ Negative:     _______	3. A sound system is used to amplify the signal from amicrophone placed on a guitar. If that microphone is positioned infront of the speakers, the signal is amplified, then received andre-amplified. The greater the input signal from the microphone, thegreater the output signal from the speaker, which in turn becomesinput for the microphone. THRESHOLD:
Positive:       _______ Negative:     _______	4. Continents are large bodies of rock and soil that float on aflexible (by geologic standards) layer of mantle. Erosion caused bywind and water lowers the surface elevation of continents (or partsof continents). But as the erosion lowers the elevation, it alsoreduces the mass of a continent. This causes the continent (or partof it) to rebound, so that its elevation is not reduced as much asexpected. THRESHOLD:
Positive:       _______ Negative:     _______	5. An engine experiences a leak in the water jacket (the part ofthe engine that allows the coolant to flow through it). As theengine heats up, steam and water expand and are forced through theleak. As the water escapes, the engine loses its ability to remaincool, and thus its temperature increases. As its temperatureincreases, more water is lost. THRESHOLD:
Positive:       _______ Negative:     _______	6. In the early 1980s, tropical rain forests were being clearedrapidly. This led some to predict that all rain forests woulddisappear from the Amazon region by 2000, and from the entire worldby 2020. This led activists and governments to work at reducingdeforestation. As of 2000, a lot of rain forest has been lost, buta majority remains. The earlier increase in clearing led to effortsto decrease clearing. THRESHOLD:
Positive:       _______ Negative:     _______	7. As the earth’s temperature increases, more evaporation takesplace. As the evaporation takes place, clouds are formed. Theclouds, being white, reflect a lot of incoming solar radiation(sunlight) back to space. This reflectance of energy to space hasthe effect of lowering temperatures at the surface. THRESHOLD: