Cumulative Exam — Cumulative exam Answers

Which statement best explains why electricity should be conserved?

Which of the following statements about water policy is true?a.The United States does not regulate water quality.b.Policies regulating water pollution and water quality have eliminated environmentalists concern about water.c.Current laws in place about water policy would eliminate water quality problems if they were enforced.d.The Clean Water Act has helped reduce water contamination, but further efforts are needed to maintain water quality.

Flooding on rivers is caused by human activity rather than natural events.

Which of the following is a potential obstacle to the commercial development of brownfields?a.the presence of pollutantsb.environmental cleanup lawsc.the costs of environmental cleanupd.all of the above

The increase in the population of people living in urban areas will cause a decrease in urban sprawl.

Penelope sees that her brother Angelos is using water carelessly. She warns Angelos to be more careful because water is a renewable resource and can be used up since it takes millions of years to form. Angelos argues that water is a nonrenewable resource and cannot be used up since it can be replaced when it rains.

Which of the following aspects of society is the least affected by limiting factors?a.locationb.healthc.behaviord.stability

Which of the following best explains why soil conservation is important to human agriculture?a.Erosion prevention prevents millions of dollars in damage from mudslides.b.It is easier to prevent the degradation of old soil than it is to generate new soil.c.If the soil salinity gets too high crops will not be able to grow in it.d.Soil contamination is a hazard to human and animal health.

Which of the following best explains why marine debris is not caused solely by countries bordering the ocean?a.Marine debris mostly originates from oceangoing ships.b.Debris is carried to the ocean by winds, rivers, and storms.c.Marine debris originates from natural sources.d.None of the above

Which of the following is a possible cost of using renewable resources?a.loss of animal speciesb.land degradationc.lower availability of freshwaterd.all of the above

Which of the following statements about mining is true?a.Mining has no long-term effects on the Earth.b.Mining is unimportant to the economy.c.Mining has no ecological impact.d.Mining allows useful minerals to be extracted from the Earth.

The first step in selective breeding is to

Which of the following most significantly determines a community's access to potable water? a. access to clean raw water sources b. the availability of money c. local drought conditions d. the level of industrial development Please select the best answer from the choices provided

Which of the following is a benefit associated with the use of energy producing technologies excluding the burning of fossil fuels?a.reduced water useb.reduced air pollutionc.reduced habitat lossd.all of the above

It is important for _______ to participate in conservation efforts.a.governmentb.businessc.citizensd.all of the above

How is the world population projected to change in the next few decades?a.It is projected to level off.b.It is projected to decrease steadily.c.It is projected to increase steadily.d.It is projected to double within 5 years.

It is important to maintain septic systems in order to _______.a.prevent treated sewage from contaminating groundwaterb.process human waste into fertilizerc.prevent untreated sewage from contaminating groundwaterd.none of the above

Which of the following can be reduced by the use of renewable energy sources?a.social costsb.economic costsc.environmental costsd.all of the above