AnswersFA Vandergrift Environmental Science 2026-27Global Change

Topic Test Answers

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21
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How are primary and secondary succession similar?

A
Both primary and secondary succession involve ecosystems that have no soil.
B
Both primary and secondary succession involve ecosystems recovering from a disruptive event.
C
Both types of succession require a pioneer species to aid recovery of ecosystems.
D
Primary and secondary succession have no similarities.
22
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The early arrival of spring in New Hampshire has no effect on wildlife.

A
T
B
F
23

Changes to the global climate could include _______.

A
changes to temperature
B
changes to pressure
C
changes to precipitation
D
all of the above
24

How does an early onset of spring through climate change affect plants?

A
their growing and flowering season starts earlier and is longer
B
their growing and flowering season starts later and is longer
C
their growing and flowering season starts earlier and is shorter
D
their growing and flowering season starts later and is shorter
25

Which of the following is not a possible effect of increasing carbon dioxide levels in the atmosphere?

A
increase in water contamination and floods
B
ocean acidification
C
cutting down forests
D
reduction of cold-related deaths
26

Human impact on ecosystems would most likely lead to secondary succession over primary succession.

A
T
B
F
27

Which of the following would most likely be a cause of primary succession?

A
farming
B
overhunting
C
volcano
D
defoliation
28

Which of the following is a negative effect of algal blooms on the environment?

A
transport of carbon to the bottom of the ocean
B
production of oxygen
C
consumption of water’s oxygen
D
large source of energy
29

Which of the following does not lead to an increase in phytoplankton reproduction?

A
increased nutrient availability
B
increased sunlight
C
increased oxygen levels
D
increased levels of carbon dioxide
30

Which scenario best describes how climate trends might affect animal migration?

A
Animals found in the Arctic may move south.
B
Animals found at the equator may move north.
C
Animals found in higher elevations will move to lower elevations.
D
Animals found in lower elevations will stay in the same location.
31

What effect can fertilizer runoff have on an aquatic ecosystem?

A
increased plant growth leading to a decrease in fish populations
B
increased plant growth leading to an increase in fish populations
C
decreased plant growth leading to a decrease in fish populations
D
decreased plant growth leading to an increase in fish populations
32

How does climate change lead to an increase in algal blooms?

A
Decreased temperatures lead to an increase in phytoplankton growth.
B
Increased levels of carbon dioxide, a greenhouse gas, leads to increased phytoplankton growth.
C
Increased pollution leads to lower levels of nutrients in aquatic ecosystems and therefore an increase in phytoplankton growth.
D
Decreased water levels caused by climate change lead to an increase in phytoplankton growth.
33

Between 1940 and 1970 most scientists were already concerned about global warming.

A
T
B
F
34

Which of the following is not a way in which humans directly impact algal bloom production?

A
industrial pollution
B
wastewater discharge
C
fertilizer in aquatic ecosystems
D
fishing
35

Pollution is the only way that humans can cause changes to ecosystems.

A
T
B
F
36

Climate warming trends allow plant and insect species to inhabit larger ranges.

A
T
B
F
37

Which of the following is not true concerning the interglacial period that began 15,000 years ago?

A
glaciers stopped advancing
B
sea levels rose
C
biodiversity increased
D
none of the above
38

What is likely to happen to the ecosystem pictured below after a period of time?

Question illustration
A
The ecosystem will undergo only primary succession.
B
The ecosystem will undergo only secondary succession.
C
The ecosystem will undergo primary succession followed by secondary succession.
D
The ecosystem will never recover.
39

Succession is a process, with each new community paving the way for the next.

A
T
B
F

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