AnswersEnvironmental Science - SC2028 AEcology 101

Patterns in Systems Answers

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1
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Earth’s systems interact through _______.

A
humans
B
glacial episodes
C
feedback mechanisms
D
none of the above
2
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Which of the following is a function of the atmosphere?

A
facilitating the process of rock formation
B
providing a moderate, livable climate
C
facilitating the process of photosynthesis
D
serving as the interface between all spheres
3

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.
4

Which is not an example of an earth system cycle?

A
seasons
B
tsunamis
C
food web
D
day and night
5

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

A
geosphere
B
hydrosphere
C
atmosphere
D
biosphere
6

What is the main energy source that drives global climate?

A
solar
B
wind
C
mechanical
D
heat
7

The atmosphere is unaffected by changes in the geosphere.

A
T
B
F
8

The hydrosphere does not overlap with any other spheres.

A
T
B
F
9

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

A
T
B
F
10

Earth is a system comprised of interacting processes.

A
T
B
F
11

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.
12

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
13

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

A
geosphere
B
hydrosphere
C
atmosphere
D
biosphere

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