Positive and Negative Feedback Loops

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

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

• decreases

• has no effect on

• amplifies

Tags

NGSS.HS-LS1-3

The heater kicks on and the house warms up, so it kicks off. Then the house cools a bit and the heater kicks back on. This continues all day. It's a _____________ loop.

• positive

• negative

Tags

NGSS.HS-LS1-3

Body temperature regulation is an example of a ______________ loop

• positive

• negative

Tags

NGSS.HS-LS1-3

Most of the body's feedback loops are ____________ loops.

• positive

• negative

Tags

NGSS.HS-LS1-3

________________ 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

Negative feedback loops result in stabilization of a system.

Negative feedback is a process that _______ the effects of a change.

• reduces

• amplifies

• has no effect

Tags

NGSS.HS-LS1-3