AnswersFL-2001340-Environmental Science BHuman Impact on the Environment

Human Impact on the Environment — Unit test Answers

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1
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What is the primary source of energy in a food chain?

A
oxygen
B
sun
C
carbon dioxide
D
water
2
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Arianne recently traveled abroad where she enjoyed eating food from different countries and learning about different cultures. A week after she returned home, she checked into the hospital with signs of nausea, fever, and diarrhea. What best explains what happened to Arianne?

A
A parasitic bacteria contaminated her food.
B
A mutualistic bacteria infected her digestive system.
C
A commensalistic organism is now living in her intestine.
D
A predatorial organism is consuming her natural bacteria.
3

The Great Pacific Garbage Patch is an area in the North Pacific Ocean that contains trash and causes harm to ocean life and those that consume that life. What lessons can be learned from this floating pile of trash?

A
There is no relationship between our daily activities and the environment.
B
There are more polluters in the Pacific Ocean than in the Atlantic Ocean.
C
There are areas of the ocean to avoid with boats.
D
There is a relationship among all living things on Earth.
4

Natural resources are classified as renewable and nonrenewable. What is the difference between the two?

A
whether or not the resource exists in nature
B
whether or not the resource can be replaced
C
whether or not the resource dwindles in supply
D
whether or not the resource is useful to humans
5

A conservation biologist has determined the status of the ecosystems in a protected area, as shown in the table below. Based on the table, which part of the pie chart represents secondary succession?Status of ecosystemsPercentage of protected areaPrimary succession10Secondary succession30Barren land5Established community55

Question illustration
A
segment A
B
segment B
C
segment C
D
segment D
6

How does conservation affect biodiversity?

A
It helps to preserve climate change.
B
It decreases species diversity.
C
It helps to preserve biodiversity.
D
It decreases ecosystem diversity.
7

If the producer population in an ecosystem decreased, what would most likely happen to the size of the herbivore population?

A
It would decrease.
B
It would double.
C
It would stay the same.
D
It would triple.
8

How could the loss of biodiversity affect humans?

A
It may cause an increase in the human population as competition is reduced.
B
It may lead to the loss of potential medicines, foods, and products.
C
It could lead to a decrease in infectious and other diseases that affect humans.
D
It could cause a decrease in the amount of pollutants on the planet.
9

Which best describes what happens when an animal does not form a social group?

A
Foraging is more difficult when hunting a large prey.
B
Reproduction is easier because of access to multiple mates.
C
Fighting off predators is easier with one individual.
D
The division of labor is more difficult as it increases competition.
10

How does mining impact the environment?

A
It has a positive impact on the environment by permanently altering the ecosystem.
B
It has a positive impact on the environment by releasing chemicals into the environment.
C
It has a negative impact on the environment by allowing toxic chemicals to harm wildlife.
D
It has a negative impact on the environment by providing new niches for wildlife to inhabit.
11

A relationship in which one organism benefits while the other is neither harmed nor helped is called

A
predation.
B
parasitism.
C
commensalism.
D
mutualism.
12

Why is sustainable use of natural resources important?

A
to ensure that natural resources are available for future generations
B
to help make daily life simpler by providing what every person needs
C
to encourage scientists to make new and elaborate discoveries
D
to prevent the exchange of resources from one region to another
13

Which organisms release carbon dioxide as waste?

c
consumers only
c
consumers and decomposers
p
producers and decomposers
p
producers only
14

Which best explains why a thick tropical forest filled with large plants typically has a lot of water vapor in the air?

A
The plants undergo transpiration.
B
The plants undergo condensation.
C
The plants prevent water from evaporating.
D
The plants prevent water from becoming runoff.
15

Pandas eat bamboo for energy. What are pandas classified as?

A
producers
B
consumers
C
decomposers
D
autotrophs

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