Human Impact on the Environment Answers

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Which situation is an example of a human-induced environmental change affecting a population?

A
Blue jays no longer live in a forest because the trees in the forest were cut down.
B
A volcanic eruption killed grasses that were growing within a few miles of the volcano.
C
Floods from a storm forced many white-tailed deer to move to a new habitat.
D
A fisher caught a few different species of fish that live in an ocean habitat.
3

Which of these organisms have been negatively affected at the species level due to human-induced environmental changes?

A
zebra mussels and kudzu
B
kudzu and dodo birds
C
zebra mussels and Caribbean monk seals
D
Caribbean monk seals and dodo birds
4

Which statements describe global warming? Select two answer choices.Global warming can be decreased through deforestation.Global warming occurs naturally.Global warming results from the buildup of nutrients in runoff.Global warming is likely increased by humans.Global warming is enhanced by nonnative species.

A
Global warming can be decreased through deforestation.
B
Global warming occurs naturally.
C
Global warming results from the buildup of nutrients in runoff.
D
Global warming is likely increased by humans.
E
Global warming is enhanced by nonnative species.
5

Ariel drew a diagram to compare two human-induced environmental changes.

Question illustration
A
Introduces substances into an environment
B
Involves the overhunting of resources
C
Causes organisms to use up resources
D
Results from the building of roads and bridges
6

Which statements describe a human-created mass extinction? Select three correct choices.It results from the disappearance of entire species in a short time.It results from the disappearance of a few organisms in a short time.It is caused by the growth of the human population.It is a type of long-term change.It is a type of short-term change.It is caused by a decrease in the introduction of nonnative species.

A
It results from the disappearance of entire species in a short time.
B
It results from the disappearance of a few organisms in a short time.
C
It is caused by the growth of the human population.
D
It is a type of long-term change.
E
It is a type of short-term change.
F
It is caused by a decrease in the introduction of nonnative species.
8

Which statement best explains how deforestation affects organisms?

A
It increases the amount of carbon dioxide in the air, enhancing global warming.
B
It reduces the amount of carbon dioxide in the air, enhancing global warming.
C
It reduces the amount of carbon dioxide in the air, enhancing ozone layer destruction.
D
It increases the amount of carbon dioxide in the air, enhancing ozone layer destruction.
9

Which situation is an example of nonnative species introduction?

A
A huge volcanic eruption in Washington destroyed many habitats.
B
A large oil spill in the Gulf of Mexico killed many organisms that lived there.
C
Horseshoe crabs in the waters of Virginia have been overfished, and their numbers have declined.
D
Water hyacinths from Asia now grow in the United States and are crowding out animals and other plants.

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