Positive vs Negative Feedback Loops

Does the graph show positive or negative feedback?

• Positive, because when the red line shifts, the blue one does also

• Negative, because the blue line starts below equilibrium

• Negative, because the two actions are keeping each other near equilibrium

• Both positive and negative because the graph moves up and down

Tags

NGSS.HS-LS1-3

Body temperature regulation is an example of a ______________ loop

• positive

• negative

Tags

NGSS.HS-LS1-3

In a positive feedback loop, each action creates a consequence that _____________________ the other action.

• decreases

• has no effect on

• amplifies

A ________________ feedback loop makes a system more stable.

• Positive

• Neutral

• Negative

• Circular

Tags

NGSS.HS-LS1-3

A _________________ feedback loop moves a system to an extreme.

• Positive

• Neutral

• Circular

• Negative

A thermostat in a central heating system can determine the temperature of your living room. It switches the air conditioner on when the temperature increases to a predetermined level and shuts it off when it cools to another level. The room temperature remains within a comfortable level regardless of the temperature outside.

• Positive Feedback Loop

• Negative Feedback Loop

Tags

NGSS.HS-LS1-3

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

In a positive feedback loop, each action creates a consequence that _____________________ the other action.

• decreases

• has no effect on

• amplifies

• reverses

A ________________ feedback loop makes a system more stable.

• Positive

• Neutral

• Negative

• Circular

Tags

NGSS.HS-LS1-3

A _________________ feedback loop moves a system to an extreme.

• Positive

• Neutral

• Circular

• Negative