Earth Systems, Interactions and Feedback Loops

1.

Multiple Choice

30 sec

1 pt

A process in which an event acts as both an input and output of the same system is called a(n)

Earth system.

feedback loop.

photosynthesis.

lithosphere.

2.

Multiple Choice

30 sec

1 pt

Oceans, polar ice caps, and groundwater would all be considered part of Earth’s __________________________.

geosphere

biosphere

hydrosphere

atmosphere

3.

Multiple Choice

30 sec

1 pt

In a ____________________ feedback loop, the output of a system moving in one direction acts as input that causes the system to move in the other direction.

positive

negative

neutral

4.

Multiple Choice

30 sec

1 pt

Negative and positive feedback loops are similar because

inputs of the cycle are also outputs of the cycle.

True

False

5.

Multiple Choice

45 sec

1 pt

Choose the correct statement about feedback loops:

Negative feedback loops destabilize a system and are rare in natural systems.

Negative feedback loops stabilize a system and are rare in natural systems.

Positive feedback loops destabilize a system and are rare in natural systems.

Positive feedback loops destabilize a system and are common in natural systems.

6.

Multiple Choice

30 sec

1 pt

Positive feedback destabilizes a system and drives it toward a(n) __________________________.

extreme

low

Calm

7.

Multiple Choice

30 sec

1 pt

What is the point of a feedback loop?

To provide the body with more energy

To provide the body with more food

To make sure the conditions in the body are always changing

To make sure the conditions in the body remain stable

8.

Multiple Choice

45 sec

1 pt

The following is an example of what type of feedback loop?

Negative Feedback Loop

Neutral Feedback Loop

Positive Feedback Loop

Cowboy Feedback Loop

9.

Multiple Choice

30 sec

1 pt

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

decreases

has no effect on

amplifies

10.

Multiple Choice

30 sec

1 pt

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

decreases

has no effect on

amplifies

11.

Multiple Choice

30 sec

1 pt

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

12.

Multiple Choice

30 sec

1 pt

As the ocean heats up, what happens to the amount of dissolved CO₂?

It increases

It decreases

It doesn't change

13.

Multiple Choice

1 min

1 pt

In a volcanic eruption, carbon dioxide dissolved in magma is released into the atmosphere during the explosion. What transition is described here?

Biosphere to geosphere

Hydrosphere to biosphere

Geosphere to atmosphere

Atmosphere to hydrosphere

14.

Multiple Choice

30 sec

1 pt

A wolf population is introduced into an ecosystem, causing the deer population to decrease. The wolf population decreases as the deer population decreases, allowing the deer to begin to increase again. This is an example of what type of feedback?

Neutral

Ecosystem

Positive

Negative

15.

Multiple Choice

30 sec

1 pt

Polar Ice Caps are melting due to an increase in Earth's temperature. This lowers the albedo of Earth, which in turn increases Earth's temperature. This is an example of what type of feedback?

Negative

Neutral

Positive

Ecosystem

16.

Multiple Choice

30 sec

1 pt

Is the graph showing positive or negative feedback?

Positive

Negative

17.

Multiple Choice

5 mins

1 pt

Earth is divided into four different spheres. Which statement is true about the interaction between two of these spheres?

Weather is an interaction between the hydrosphere and the geosphere.

A plant receiving water from precipitation is an interaction between the biosphere and the hydrosphere.

An ice cap providing shelter for an arctic animal is an interaction between the biosphere and the hydrosphere.

The formation of the Grand Canyon is an example of an interaction between the geosphere and the atmosphere.

18.

Multiple Choice

5 mins

1 pt

How do the geosphere and the hydrosphere interact?

The geosphere stores parts of the hydrosphere.

The geosphere erodes (shapes) the hydrosphere.

The hydrosphere stores parts of the geosphere.

19.

Multiple Choice

30 sec

1 pt

The major source of the Earth's energy is...

Solar E

Wind E

Geothermal E

Tidal E

20.

Multiple Choice

30 sec

1 pt

How does carbon interact with the geosphere?

It's dissolved in the oceans

Animals exhale carbon dioxide

Carbon is stored in rocks, like coal

Carbon release carbon dioside by burning fossil fuels

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