Human Impact on the Environment

Assessment
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Alexine Thomas
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Science
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9th Grade
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84 plays
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Medium
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15 questions
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1.
Multiple Choice
In the 1800s rabbits were introduced for the first time into Australia. Here they had no natural predators and a plentiful food supply. What happened several years after the rabbit was introduced into Australia?
The rabbits began to overpopulate greatly.
Populations of animals competing with rabbits grew.
The rabbit population declined sharply.
New rabbit predators evolved.
2.
Multiple Choice
The design of air conditioners and aerosol cans has been changed in the last few years in an attempt to reverse which ecological problem?
deforestation
freshwater pollution
hole in the ozone layer
acid rain
3.
Multiple Choice
Poisons such as DDT build up in lakes and streams due to runoff. Then they enter the food chain. Once in living organisms, the poisons are not broken down and their concentrations increase as they are passed along the food chain.
Which term best describes this ecological phenomenon?
global warming
loss of biodiversity
biological magnification
loss of genetic diversity
4.
Multiple Choice
Succession is the natural replacement of species that takes place in an area over time.
What is the major difference between primary and secondary succession?
Primary succession happens much faster than secondary succession.
Primary succession begins on bare rock, while secondary starts on soil.
Primary succession occurs after a minor disturbance, while secondary occurs after a major disturbance.
Primary succession is the new growth of grasses, and secondary succession is the new growth of trees.
5.
Multiple Choice
Which of the following best describes the term biological magnification?
The buildup of non-biodegradable chemicals in consumers as they are passed up the food chain
When members of a crowded population are at odds for food, water, space, and other resources
Using the earth's resources more carefully, and preserving and restoring natural habitats
When food, water, and space are limited, causing carrying capacity to be reached
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