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Systems of the Biosphere Answers

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1
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Which of the following is a function of the geosphere?

A
facilitating the movement of water through spheres through transpiration
B
providing a moderate, livable climate
C
facilitating the process of photosynthesis
D
serving as the interface between the other spheres
2
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What is the main difference between negative and positive feedback?

A
Positive feedback leads to system instability, while negative feedback leads to system stability.
B
Positive feedback is caused by human impact, while negative feedback occurs naturally.
C
Negative feedback ultimately leads to an increase in the first variable, while positive feedback ultimately leads to a decrease in the first variable.
D
Positive feedback occurs at a much faster rate than negative feedback.
3

Which system protects us from radiation and the vacuum of space?

A
geosphere
B
hydrosphere
C
atmosphere
D
biosphere
4

Which of the following best explains why the biosphere is a key component of the Earth’s systems?

A
The biosphere is a key component of the Earth’s systems because it is a common concept to many disciplines in science.
B
The biosphere is a key component of the Earth’s systems because the seasonal cycles directly affect primary productivity.
C
The biosphere is a key component of the Earth’s systems because it helps drive the other systems by interacting with and exchanging matter and energy with the other spheres.
D
The biosphere is a key component of the Earth’s systems because it has evolved to create the chemical composition of the planet we know today.
5

What is the most likely effect a decrease of plant life in the biosphere would have on the atmosphere?

A
A decrease in plant life would have no effect on the atmosphere.
B
A decrease in plant life would cause carbon dioxide levels to increase and oxygen levels to decrease.
C
A decrease in plant life would cause carbon dioxide levels to decrease and oxygen levels to increase.
D
A decrease in plant life would cause an increase in all gases in the atmosphere.
6

What system facilitates the movement of water between spheres through the process of transpiration?

A
geosphere
B
hydrosphere
C
atmosphere
D
biosphere
7

Positive feedback interactions in Earth’s systems are always a result of human action.

A
T
B
F
8

The atmosphere is unaffected by changes in the geosphere.

A
T
B
F
9

What system includes oceans, lakes, rivers, and groundwater?

A
geosphere
B
hydrosphere
C
atmosphere
D
biosphere
10

Human impact on one system leads to changes in more of Earth’s systems.

A
T
B
F
11

What is the most likely effect a decrease of plant life in the biosphere would have on the atmosphere?

A
A decrease in plant life would have no effect on the atmosphere.
B
A decrease in plant life would cause carbon dioxide levels to increase and oxygen levels to decrease.
C
A decrease in plant life would cause carbon dioxide levels to decrease and oxygen levels to increase.
D
A decrease in plant life would cause an increase in all gases in the atmosphere.
12

Earth is a system comprised of interacting processes.

A
T
B
F
13

Which is not an example of an earth system cycle?

A
seasons
B
tsunamis
C
food web
D
day and night
14

What system includes the core, mantle, and crust of the Earth?

A
geosphere
B
hydrosphere
C
atmosphere
D
biosphere
15

The hydrosphere does not overlap with any other spheres.

A
T
B
F
16

Glacial episodes are an example of _______.

A
positive feedback
B
negative feedback
C
the “Daisy model”
D
the Gaia hypothesis
17

What system facilitates the movement of water between spheres through the process of transpiration?

A
geosphere
B
hydrosphere
C
atmosphere
D
biosphere
18

The atmosphere is unaffected by changes in the geosphere.

A
T
B
F

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