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Ch.16 How Humans Impact The Ecosystem Part 2
Test Description: Ch.16
Instructions: Answer all questions to get your test result.
1) Why are frogs considered an indicator species for water quality?
A
They develop disease when they come in direct contact with pollutants.
B
They come into direct contact with pollutants and show readily observed effects like deformities.
C
They are easily killed by direct contact with pollutants.
D
They are able to break down pollutants.
2) Which member of the following food chain is most likely to be affected by mercury, a pollutant. ( Think biomagnification) Food chain: - Algae - Zooplankton - Salmon - Bear
A
Bear
B
Algae
C
Salmon
D
Zooplankton
3) How might an introduced plant species kill native plant species? Think Kudza plants.
A
Its rapid growth can deprive native plants of sunlight.
B
Its can deprive the native plant from oxygen.
C
Its rapid growth can deprive native plants of food.
D
It can cause soil loss from erosion.
4) What is one of the greatest threats to biodiversity on Earth?
A
Habitat destruction
B
decrease in food supply
C
loss of drinking water
D
pollution
5) In which biome is biodiversity most threatened?
A
tiaga
B
wetland
C
grasslands
D
Tropical rain forest
6) Why might an introduced animal species over run a native species in an ecosystem?
A
It is a predator of the native species.
B
it is more energy efficient, so it eats less food.
C
Its population size is smaller than those of native species.
D
It often has no natural enemies.
7) What incident led to the clean air act after 20 people dies in a small town due to smog?
A
The dropping of the atomic bomb
B
None of the above
C
Three Mile Island nuclear explosion
D
Inverson smog in Donora Pennsylvania
8) What does the endangered species act do?
A
It protects endangered plant species.
B
It protects populations of animals from predators
C
It protects organisms that are near extinction and their environment.
D
It provides food for endangered species.
9) Why does clear cutting of trees lead to a loss of biodiversity?
A
Lumber companies kill the animals in an area when they cut trees.
B
An entire ecosystem is destroyed when all the trees in an area are cut down.
C
Trees seedlings cannot be produced.
D
To much sunlight enters the area after the trees are cut down.
10) Imagine one day you can't go to school because a river is now in the way. This is an example of _________________________ because a barrier is formed that prevents you from moving within home city or area.
A
introduced species
B
a disaster
C
clean air act
D
habitat fragmentation
*select an answer for all questions
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