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Human Impact Review - Honors

Total questions: 18

Worksheet time: 16mins

Name
Class
Date
1.

Which of the following is NOT a threat to biodiversity?

a)

Pollution

b)

Deforestation

c)

Invasive Species

d)

Ecological Succession

2.

When human-made chemicals and garbage find their way into nature and harm the air, soil, and water it is called

a)

pollution

b)

habitat destruction

c)

overexploitation

d)

climate change

3.
Why are fossil fuels a nonrenewable resource? 
a)
they take millions of years to replace 
b)
they can be used over and over again
c)
they are used to heat and light homes 
d)
they cause air and water pollution 
4.

Identify the process shown in this diagram. (Hint: This picture is in your textbook.)

a)

Extinction

b)

Toxin Accumulation

c)

Pollution

d)

Biomagnification

5.

An ecological footprint is

a)

the mark a person’s shoe makes in soft earth.

b)

the number of animals a person has killed.

c)

the energy, land, and resources used by a group of organisms.

d)

the number of trees people cut down.

6.

Which one of these does not add CO2 to the atmosphere?

a)

cooking with gas

b)

planting trees

c)

burning wood

d)

riding in a bus

7.
Salt water is an abundant resource but unusable for irrigation and drinking. As demands on freshwater sources increase, the use of desalination processes to remove salt from ocean water is increasing. A concern of desalinating water is the large amounts of recovered salts that are returned to the ocean. Which of the following describes the most likely impact of desalination on the surrounding ocean environment? 
a)
Methane gas would pollute the ocean environment as shoreline organisms begin to die and decay.
b)
Alteration in ocean salt levels would cause loss of species and unbalanced populations in marine food webs.
c)
Nonrenewable resources in the ocean environment would become depleted and upset the ecosystem's balance.
d)
Increased levels of salts and minerals in the ocean would result in overpopulation of marine bivalves due to strengthened shells
8.
New fuels are being produced by converting corn and grasses into compounds containing alcohols that can be broken down for energy in various engines. The purpose of this research is to
a)
 reduce the use of nonrenewable resources.
b)
increase the rate of air pollution.
c)
reduce the rate of homeostasis in organisms.
d)
 cause a loss of biodiversity in the rain forests.
9.
DDT and other pesticides used over 50 years ago are still affecting the environment today. Scientists have found these substances in recent glacier runoff. Glacier runoff occurs during the summer, when precipitation that has fallen on glaciers during the winter is released. Ice layers from existing glaciers have been analyzed. The results of this analysis show that the concentrations of DDT and other pesticides were highest about 10 years after the use of these substances was banned. This information shows that
a)
DDT and other pesticides cause glacier runoff during the summer.
b)
it takes humans over 50 years to analyze a glacier.
c)
precipitation helps to break down pesticides.
d)
the decision of one human generation may have an impact on future generations.
10.
The northern elephant seal was almost hunted to extinction in the 1800s. By the late 1890s, approximately one hundred seals were left, reducing the gene pool of the population. What will be the consequence of this reduction?
a)
 Competition within the population will increase.
b)
The surviving elephant seals will be better able to adapt.
c)
 Inbreeding will be less frequent among the remaining population.
d)
The elephant seals will be more vulnerable to environmental change. 
11.
A community is concerned about the water quality of a nearby lake. Increased sedimentation in the lake is endangering the native habitat. The increased sedimentation is most likely caused by which of the following?
a)
trees planted along the shore of the lake
b)
construction of homes along the lake
c)
the amount of sunlight on the lake
d)
the amount of fish in the lake
12.
When fertilizers run off farmland into streams and ponds, the nitrogen content of the water increases. This can lead to rapid growth of algae in a process called eutrophication. How can this process affect other organisms in the water?
a)
Oxygen is used up as algae is decomposed, reducing the amount available to other organisms.
b)
The water becomes better able to support aerobic organisms.
c)
The algae provide food for fishes and other organisms, leading to decreased algae populations.
d)
The extra nitrogen provides additional food for the other organisms, increasing their population.
13.
A strip mining company wants to lease some land that is currently part of a national park. They promise to reclaim the land should any minerals be mined from the area, and they are willing to pay top dollar for the rights. As an ecologist, what factors would you raise with the local government?
a)
the threat to local biodiversity
b)
management of the land after the company leaves
c)
the new jobs that would be created
d)
the increased traffic in the area
14.
According to the pie chart, how much carbon dioxide emissions come from transportation?
a)
7.9%
b)
25.9%
c)
13.1%
d)
19.4%
15.

Global warming has been linked to a decrease in

a)

the size of the polar ice caps.

b)

the temperature of Earth.

c)

the rate of species extinction.

d)

the rate of carbon dioxide production.

16.
Continued depletion of the ozone layer will most likely result in
a)
an increase in skin cancer among humans 
b)
a decrease in atmospheric pollutants 
c)
an increase in marine ecosystem stability 
d)
a decrease in climatic changes
17.

Deforestation by burning has been described as a "double whammy" to the environment, meaning it has 2 negative impacts. Why is this description accurate?

a)

Forest burning releases CO2 while decreasing oxygen, which disrupts cycles.

b)

Deforestation reduces the amount of oxygen in the atmosphere, which depletes the ozone layer.

c)

Forest clearing is often followed by land development, which often leads to increased noise pollution.

d)

Deforestation increases the number of plant and animal species by destroying habitat.

18.

This image is an example of what type of land degradation

a)

Desertification

b)

Deforestation

c)

Urban Sprawl

d)

Urbanization

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