topic 7

The overuse of chemical fertilizers has resulted in the growth of some lawns in which decomposers cannot live. This would interfere most directly with the ability of the lawn ecosystem to

• recycle energy

• recycle nutrients

• maintain atmospheric pH

• reduce biodiversity

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An example of recycling is

• An example of recycling is

• turning off the lights when leaving a room

• using plastic from a soda bottle to make a certain type of clothing

• using two paper towels rather than five to clean up a spill

Which graph best shows the changes in global human population and natural resource use over the past 500 years?

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The burning of fossil fuels has harmed the environment by

• decreasing acid rain in the northeast United States

• adding carbon dioxide to the atmosphere

• increasing biodiversity in the lakes and ponds of the Adirondacks

• increasing biodiversity in the lakes and ponds of the Adirondacks

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Homeowners have been encouraged to learn how to identify invasive plants and to remove them if they find them. The most likely reason for removing invasive plants is to

• allow only one type of native plant to grow

• preserve biodiversity

• eliminate unfamiliar food sources

• increase the rate of ecological succession

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Some states require shoppers to pay a deposit on certain beverage containers made of plastic and glass. When shoppers return the containers, their deposits are returned to them. How is this system intended to help the environment?

• It encourages people to buy products that do not have a deposit.

• It reduces the amount of money shoppers actually spend

• It reduces the amount of plastics and glass put into landfills.

• It forces manufacturers to reduce air pollution when they are making the containers

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Humans have an effect on ecosystems when they use native grasslands or forested areas for farming or urban use. One negative effect of these changes on the ecosystem is that there will be

• less biodiversity

• more homes

• successful economic growth

• increased food production

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Many oak trees are cut down and removed from an oak-hickory forest. A likely result of the direct harvesting of the oak species would be the

• disruption of natural cycles

• conservation of these natural forest resources

• recycling of all the nutrients in the forest

• prevention of the extinction of animals native to the area

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When rain forests are cut down, there is a

• loss of fossil fuels that could be used by industry

• release of excess oxygen to the atmosphere

• release of chemicals which cause helpful mutations

• loss of genetic material available for research

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A company that produces paint is planning to build a small factory in a rural community. The factory would provide many needed jobs. Before the community agrees to allow the factory to be built, the community should

• investigate the use of paint as a method of biological control

• consider just the economic advantages of building the new factory

• assess the risks of the new factory and compare these to the benefits

• insist the factory use finite resources located in the community

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