Unit Test — Cumulative exam Answers

Which of the following is not a characteristic of the source of rivers and streams?a.high oxygen levelsb.freshwater fishc.cooler temperaturesd.murky waters

Changes to waterways will discontinue if human impacts on waterways cease.

Which of the following energy sources is expected to have the highest rate of consumption in 2030?a.coalb.natural gasc.nucleard.renewable energy

The high productivity of American agriculture is exemplified by _______.a.low crop yields per farm workerb.high crop yields per farm workerc.the small cultivated area per inhabitantd.the small cultivated area per farmer

Which of the following is true about glass recycling?a.Recycling glass reduces the rate of deforestation.b.Recycling glass eliminates greenhouse gas emissions.c.Recycling glass is an energy-saving practice.d.Recycling glass has an incredibly short turn around time.

Human use of groundwater has _______ over time.a.increasedb.decreasedc.decreased and then increasedd.remained the same

Soil generation and soil conservation are equally effective agricultural strategies.

Under maritime law, cruise ships are not allowed to discharge their garbage at sea.

How is the heat generated by the reactor core of a nuclear power plant used to provide power to buildings?a.It is used directly to heat homes and offices.b.It generates steam, which turns a turbine, powering a generator.c.It generates steam, which is then condensed back to water. This process produces energy.d.All of the above

Human health is unaffected by environmental limiting factors.

Which of the following best explains how human activities can directly contribute to landslides? a. Removing plants from hillsides eliminates the root structures that anchor soil. b. Clearing trees from hills increases the frequency of rainstorms. c. Human activities tend to reduce the risk of fires. d. Landslides are not impacted by human activities. Please select the best answer from the choices provided

What is an advantage to alternative energy technology?a.Using alternative energy technology increases the demand for fossil fuels.b.Most alternative energy technologies use nonrenewable resources.c.Alternative energy technology can reduce the environmental impact of burning fossil fuels.d.There is no advantage to using an alternative energy technology.

Why does culture establish the standard by which quality of life is measured? a. Cultures are defined by the demographics of their populations. b. Culture establishes the framework by which individuals judge their environment. c. Culture defines the domains of family and health that define quality of life. d. A society’s culture defines its socioeconomic conditions. Please select the best answer from the choices provided

An understanding of how human activity affects the environment is important for environmental policy makers.

Sustainability can be achieved through careful resource management.

Energy must be transformed in ecosystems because _______.a.energy cannot be created or destroyedb.an organism’s energy must go somewherec.an organism’s energy must come from somewhered.all of the above

Which of the following best describes energy transformations in ecosystems?a.Most energy in a lower trophic level is passed to higher trophic levels.b.Heat is not a significant waste product as energy passes between trophic levels.c.Most of the energy collected by an organism is not passed on to other organisms.d.Tertiary consumers collect the most energy in an ecosystem.

Nuclear power is an example of an alternative energy source that has greater negative environmental impacts than the burning of fossil fuels.

After the energy crisis of the 1970’s and the OPEC oil embargo, the US _______.a.increased its dependency on foreign oilb.began to wean itself off of foreign oil and the economic vulnerability it bringsc.changed over to all renewable energy sourcesd.began building new nuclear power plants to replace fossil fuel use

It is best to say that restoring and protecting estuaries and wetlands _______.a.helps prevent pollution in coastal waterwaysb.results in higher juvenile fish mortalityc.improves the health of coastal ecosystemsd.has no impact on fish populations