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Human Influences on the Environment

Total questions: 25

Worksheet time: 15mins

Name
Class
Date
1.
a)
A
b)
B
c)
C
d)
D
2.
a)
A
b)
B
c)
C
d)
D
3.
a)
fertilizers
b)
herbicides
c)
pesticides
d)
smoke
4.
a)
A
b)
B
c)
C
d)
D
5.
a)
A
b)
B
c)
C
d)
D
6.
a)
A
b)
B
c)
C
d)
D
7.
a)
Cutting down the forest
b)
Removing the cattle
c)
Taking the silt out of the lake
d)
Using pesticides on the crops
8.
a)
A
b)
B
c)
C
d)
D
9.
How has the atmosphere changed over the last 10,000 years?
a)
Carbon dioxide has increased
b)
Carbon dioxide has decreased
c)
Water vapour has remained at a constant level
d)
Nitrogen has increased
10.
What is shown in this diagram?
a)
How winds are formed
b)
The greenhouse effect
c)
The water cycle
d)
What the atmosphere is made of
11.
What is one cause of air pollution?
a)
litter found on the side of the road
b)
water used as a coolant by power plants
c)
burning fossil fuels
d)
Dropping litter
12.
Depletion of the ozone layer is a cause of air pollution
a)
true
b)
false
13.
A farmer is using a crop duster to help spray chemicals on his crops to kill insects. The chemicals the farmer uses seeps into the soil and drains into the nearby river. How does this affect the animals that live in the river?
a)
They swim away
b)
They change color
c)
They get sick or die
d)
The chemicals give them more energy
14.
How does nutrient-rich agricultural runoff influence water ecosystems?
a)
increases overall productivity
b)
increases oxygen levels
c)
decreases algal productivity
d)
can result in harmful algal blooms
15.
Most water pollution is the result of
a)
human activities.
b)
drought.
c)
volcanic eruptions.
d)
storms.
16.
Most water pollution is the result of
a)
human activities.
b)
drought.
c)
volcanic eruptions.
d)
storms.
17.
Which organism would have the greatest concentration of pollution because of biomagnification?
a)
zooplankton
b)
large fish
c)
fish-eating birds of prey
d)
small fish
18.
Which human activity would be most likely to have a negative impact on the environment?
a)
Planting trees to control soil erosion
b)
Limiting the use of chemicals that kill weeds.
c)
Stopping the draining of swamps.
d)
Burning coal and oil to generate electric power.
19.
The greenhouse effect affects life on Earth by
a)
trapping oxygen
b)
cooling the temperatures
c)
trapping warmth
d)
recycling nitrogen
20.
Which member of the food chain is MOST affected by mercury, a fresh water pollutant?algae --> zooplankton--> small fish --> large fish --> hawk
a)
algae
b)
zooplankton
c)
large fish
d)
hawk
21.

What is the term for a species that influences the survival of other species in an ecosystem?

a)

exotic species

b)

niche species

c)

diverse species

d)

keystone species

22.

Which human activity can affect the survival of a population, possibly leading to extinction?

a)

captive breeding

b)

habitat destruction

c)

habitat preservation

d)

protecting endangered species

23.

How can many types of food waste and yard trimmings be recycled

a)

by reusing

b)

by burning

c)

by bagging

d)

by composting

24.

The addition of excess nutrients to an aquatic community or ecosystem that can change or alter the environmental balance

a)

Hibernation

b)

Succession

c)

Eutrophication

d)

Phototropism

25.

Which of the following is an example of humans not harming an ecosystem?

a)

polluting their local streams

b)

clearing large amounts of land

c)

littering

d)

recycling

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