Feedback Loops

If the environment gets cold, we will often shiver in order to:

• keep body temperature the same as the external temperature
• decrease body temperature
• increase body temperature
• regulate blood pressure

Tags

NGSS.HS-LS1-3

What type of feedback loop is shown?

• negative
• neutral 
• positive

Tags

NGSS.HS-LS1-3

Negative Feedback Loops:

• amplify processes
• prevent small changes from getting larger
• are initiated during childbirth
• are found only in plants

Tags

NGSS.HS-LS1-3

The two types of feedback systems that help organisms maintain homeostasis are:

• positive and negative 
• receptor and effector
• static and dynamic
• minor and major

Tags

NGSS.HS-LS1-3

Maintaining body temperature is an example of a:

• negative feedback loop
• positive feedback loop

Tags

NGSS.HS-LS1-3

As the Earth warms, increased evaporation produces more clouds. Clouds increase albedo, reflecting more light away from the Earth. The temperature falls. Rates of evaporation fall.

• Positive Feedback Loop

• Negative Feedback Loop

Tags

NGSS.HS-ESS2-2

NGSS.HS-ESS2-4

A organization posts an advertisement with a very "click-baity" title and image on a social media platform. The title and image draw in people to click on the ad. As the ad receives more views, the algorithm shows the ad to more people.

• Positive Feedback Loop

• Negative Feedback Loop

As the Earth warms, upper layers of permafrost melt, producing waterlogged soil above frozen ground. Methane gas is released into the environment. The greenhouse effect is enhanced. The Earth warms, melting more permafrost.

• Positive Feedback Loop

• Negative Feedback Loop

Tags

NGSS.HS-ESS2-2

As the Earth warms, ice cover melts, exposing soil or water. Albedo decreases. More energy is absorbed by the Earth’s surface. Global temperature rises. More ice melts.

• Positive Feedback Loop

• Negative Feedback Loop

Tags

NGSS.HS-ESS2-2

NGSS.HS-ESS2-4

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 Feedback Loop

• Negative Feedback Loop

Tags

NGSS.HS-LS2-6