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Human Impact - Earth & Space Science

Total questions: 50

Worksheet time: 45mins

Name
Class
Date
1.

1. What would Earth be like without the greenhouse effect?

a)

The same temperature

b)

a little cooler than it is now

c)

. Too cold to live

d)

a little warmer than it is now

2.

1. Why is firewood considered to be a renewable resource?

a)

It can be replenished over time.

b)

It is used up faster than it can form.

c)

It is made from coal.

d)

It can be made synthetically.

3.

What is global warming

a)

the normal temperature fluctuations of Earth's climate cycle

b)

the melting of the polar ice caps

c)

the trend of increasing temperatures on Earth

d)

the changes in Earth's biosphere that affect the atmosphere

4.

How might an introduced plant species kill native plant species?

a)

. Its rapid growth can deprive native plants of sunlight.

b)

Its rapid growth can deprive native plants of food.

c)

It can cause soil loss from erosion.

d)

Its rapid growth can deprive native plants of oxygen.

5.

1. What is one of the greatest threats to biodiversity on Earth?

a)

habitat destruction

b)

loss of drinking water

c)

decrease in food supply

d)

pollution

6.

1. Why might an introduced animal species overrun native species in an ecosystem?

a)

. Its population size is smaller than those of native species.

b)

. It is more energy efficient, so it eats less food.

c)

It is a predator of the native species.

d)

It often has no natural enemies

7.

Which term describes the practice of managing resources so that current needs are met without harming future generations?

a)

species introduction

b)

sustainable development

c)

habitat fragmentation

d)

biomagnification

8.
Many different types of organisms. 
a)
Pioneer species
b)
Community
c)
Biodiversity
d)
Population
9.

Which of these is one cause of deforestation?

a)

Urbanization

b)

Buying a Christmas tree during the holidays

c)

Overbreeding birds in the wild

d)

Cutting down the tree in your backyard

10.
What is deforestation?
a)
Clearing Earth's forests on a massive scale
b)
Eating too much vegetables
c)
Going to a forest and pulling weeds
d)
Clearing the five trees in my backyard
11.

The threat to biodiversity that occurs when the homes of different species are destroyed

a)

pollution

b)

habitat destruction

c)

overexploitation

d)

climate change

12.

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

13.
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 
14.
What does conserving resources mean?
a)
Use as much of the resources as you can
b)
Only use the resources at school
c)
Protecting the resource so it does not run out
15.
Which group includes ALL renewable resources?
a)
Coal, trees, water, oil
b)
Water, wind, sun, plants
c)
Minerals, sun, natural gas, water
16.
Most water pollution is the result of
a)
human activities.
b)
drought.
c)
volcanic eruptions.
d)
storms.
17.
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
18.
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.
19.
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. 
20.
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
21.
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.
22.
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
23.
Whaling was a very profitable profession until whale populations crashed. The global community came together to enact a ban on whaling. However, Japan and Norway have not agreed to stop whaling. Which of the following is the most likely consequence of their decision?
a)
The whale populations are bouncing back very successfully and are unaffected by Japan and Norway continuing to whale.
b)
The whale populations are not rebounding as quickly as they might if all of the countries agreed not to hunt whales. 
c)
The whale populations have mutated into new kinds of organisms.
d)
The whales are getting better at avoiding capture. 
24.

When domesticated rabbits were introduced to Europe their population increased rapidly and damaged agriculture and the natural environment. Which statement is the BEST conclusion from this event.

a)

humans use technology for organisms to adapt.

b)

human actions can lead to an imbalance in ecosystems.

c)

the population of rabbits decreased in new areas.

d)

Rabbits from other continents cannot survive in other ecosystems.

25.

An example of turning off the light when leaving a room is?

a)

using potential energy.

b)

conserving energy.

c)

using chemical energy.

d)

wasting energy.

26.

It is estimated that half of the 10 million species of organisms on the planet live in the tropical rain forests. Deforestation of the rain forest causes the extinction of as many as 50,000 species per year. Clearing tropical rain forests causes the extinction of many species because

a)

plants and animals are exposed to high levels of carbon dioxide.

b)

pollution caused by humans increases the greenhouse effect.

c)

many unique habitats and ecosystems are being completely destroyed.

d)

destruction of the rainforest contributes to the depletion of the ozone.

27.

In the forest spotted owl make their home in the cavities of dead trees. The same habitat is home to rodents that owls feed on. Logging by humans have caused the population of owls to decline. What statement BEST explains the relationship between humans and the spotted owl.

a)

humans have taken away resources needed by owls, so there are fewer owls.

b)

Humans increased the available food for the owls, so there are more owls.

c)

Humans eliminated predators of the owls, so the owls increased.

d)

Humans moved the owls to the zoo, so there are less owls in the woods.

28.
What is urbanization?
a)
Process of making an aread more city-like
b)
Process of making an area more country-like
c)
Tearing down a large shopping mall
d)
Moving to an urban area
29.
Deforestation has an affect on the water cycle
a)
true
b)
false
30.

Deforestation causes an increase in atmospheric carbon dioxide

a)

true

b)

false

31.
what is the leading cause of deforestation?
a)
Diseases 
b)
Housing market
c)
Agriculture and Farming
d)
Paper mill
32.
What are the effects of deforestation ?
a)
loss of habitat
b)
increased green house gasses 
c)
soil erosion and flooding
d)
all of the above
33.

Which of these will reduce deforestation

a)

Recycle as much paper as possible

b)

Stop paying third world countries to produce more biofuel crops

c)

Replant sapling immediately trees have been cleared

d)

All the above

34.

what are people doing to counter deforestation?

a)

the US stopped foreign wood products form entering the country.

b)

they passes laws to protects endangers wild life therefore protecting the forest they live in

c)

the US created animal shelters for endangered wild life.

35.

As part of a study of the effects of urbanization, local scientists have taken many data samples over the course of 20 years. The scientists detected increases in local soil erosion, carbon dioxide levels, and air temperatures. What most likely caused these changes?

a)

deforestation of woodlands

b)

decreased water quality

c)

altered water flow

d)

erosion of topsoil

36.

In 2005, the government of Brazil released information showing that over 10,000 square miles of the Amazon rain forest had been destroyed. Cattle ranching is the leading cause of deforestation reported by the Brazilian government. What will most likely be the immediate result of deforestation in the Amazon rain forest?

a)

a decrease in the use of alternative energy

b)

an increase in biodiversity in the region

c)

a decrease in the rate of soil erosion

d)

an increase in atmospheric carbon dioxide

37.

The definition of Desertification is...

a)

Land that is fertile and able to grow plants

b)

the process of ocean water losing salt

c)

the process in which land loses fertility and ability to grow plants

d)

giving humans the advantage of having fertile soil

38.

The CAUSES of desertification are:

a)

drought

b)

flooding

c)

human environment interaction

d)

all of the above

39.

An EFFECT of desertification is:

a)

food shortages

b)

strong economies

c)

growth of new plant life

d)

all of the above

40.

Ways of fighting Desertification, are ___________________________________.

a)

rotating crops

b)

improving irrigation systems

c)

educating farmers

d)

all of the above

41.

Overgrazing means __________________________________________.

a)

allowing herds to drink water in the grasslands

b)

traveling from place to place

c)

excessive grazing which causes damage to grasslands

d)

leaving herds unattended

42.

An economic indicator that would be impacted greatly in this region would be which of the following?

a)

literacy rate

b)

life expectancy

c)

infant mortality rate

d)

all of the above

43.

Human Environmental Interaction is a cause of desertification.

a)

True

b)

False

44.

What is desertification?

a)

Land is gradually turned into a desert, usually on the edges of an existing desert.

b)

Area of desert with low precipitation

c)

The process of turning an cake into a dessert

d)

Area at risk of high precipitation

45.

Which is a consequence of an increase in greenhouse gases?

a)

Ice caps freezing

b)

global cooling

c)

sea levels rising

46.

What is biodiversity?

a)

All the same species living in one area

b)

the variability among organisms

c)

all the endangered species in one area

47.

What is a good way to tell people the good about renewable resources and bad about fossil fuels?

a)

let them read it for themselves

b)

Education

c)

they already know

d)

they don't need to know

48.

Ozone layer depletion is caused by CFC's being released in the atmosphere. What is the negative effect of Ozone Layer Depletion?

a)

Earths temperatures will increase

b)

This will cause ice cap to melt, leading to flooding

c)

Greater amounts of UV rays will reach earth

d)

All of the earths atmosphere gases will be released out into space

49.

What would occur if plants are removed?

a)

An increase in Oxgyen

b)

An Increase in Soil Erosion

c)

More precipitation in the area

d)

There is no effect from the removal of plants

50.

Deforestation, urbanization, desertification, and erosion are ways that people impact Earth. Which statement below best identifies the relationship between these terms?

a)

Both erosion and desertification can lead to deforestation and urbanization.

b)

Both deforestation and urbanization can lead to desertification and erosion.

c)

Both urbanization and erosion can lead to deforestation and desertification.

d)

Both deforestation and erosion can lead to urbanization and desertification.

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