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Earth Science Feedback Loops

Authored by Lisa Thompson

Science

9th Grade

NGSS covered

Earth Science Feedback Loops
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15 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

As the Earth warms, organic matter in soil is decomposed faster, more carbon dioxide is released. The enhanced greenhouse effect occurs, the Earth warms further and rates of decomposition increase

Positive Feedback

Negative Feedback

Tags

NGSS.HS-ESS2-2

NGSS.HS-ESS3-5

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

As the Earth warms, evaporation increases. Snowfall at high latitudes increases, icecaps enlarge. More energy is reflected by increased albedo of ice cover. The Earth cools. Rates of evaporation fall.

Positive Feedback

Negative Feedback

Tags

NGSS.HS-ESS2-2

NGSS.HS-ESS2-4

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

As the Earth warms, polar icecaps melt, releasing large numbers of icebergs into oceans. Warm ocean currents such as the Gulf Stream are disrupted by additional freshwater input into oceans. Reduced transfer of energy to the poles reduces temperature at high altitudes. Ice sheets reform and icebergs retreat. Warm currents are re-established.

Positive Feedback

Negative Feedback

Tags

NGSS.HS-ESS2-2

NGSS.HS-ESS2-4

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

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

Negative Feedback

Tags

NGSS.HS-ESS2-2

NGSS.HS-ESS2-4

5.

MULTIPLE CHOICE QUESTION

1 min • 5 pts

When the population of deer in an area begin to grow, they start overgrazing the vegetation that feeds them. When there is not enough vegetation to sustain the rapidly growing deer population, they will begin to die off until the vegetation grows back to normal levels and the deer will have enough food to repopulate again. 

Positive

Negative

Tags

NGSS.HS-LS2-1

NGSS.HS-LS2-2

NGSS.HS-LS2-6

6.

MULTIPLE CHOICE QUESTION

1 min • 5 pts

Media Image

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

7.

MULTIPLE CHOICE QUESTION

1 min • 5 pts

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

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