Unit 6 Review

When the combustion engine was invented it had many positive effects on society, but years later it has been discovered that the burning of oil and coal has one major negative effect on the environment. What is that negative effect?

• It improves air quality.

• It uses renewable resources.

• It causes a hole in the ozone.

• It increases the greenhouse effect.

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New technology, such as renewable energy sources, has many positive aspects such as

• using nonrenewable resources.

• reducing the emissions of carbon dioxide.

• increasing the annual average temperature.

• increasing the cost of energy sources such as fuel.

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Oil, natural gas, and coal are considered to be nonrenewable resources. Why are these fuels considered to be nonrenewable?

• The burning of these fuels does not allow the waste products to be recycled.

• These fuels are available in a limited supply--when the fuel is used it is no longer available.

• The amount of pollution released from the use of these fuels is much higher than with renewable sources.

• The technology used to generate energy by the use of these fuels is much older and less efficient than current technology.

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According to the information in the graph, the BEST way for Virginia to cut water consumption would be to decrease

• coal mining.

• automobile use.

• drinking supplies.

• electricity usage.

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Which graph BEST reflects the possible outcome of a giant volcanic release of methane and other greenhouse gases into the atmosphere?

• A

• B

• C

• D

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Which is the BEST title for this list?

• Tips to Conserve Water

• Tips to Conserve Energy

• Ways to Reduce Pollution

• Way to Help the Environment

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Burning fossil fuels increases the amount of carbon dioxide in the atmosphere. What is the LIKELY negative effect on Earth if extra carbon dioxide is added to our atmosphere?

• acid rain

• global warming

• increased plant growth

• a hole in the ozone layer

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Over the last several decades, scientists have addressed the problem of nonrenewable natural resources such as fossil fuels. Humans are using fossil fuels at a rapid rate and scientists believe that one day we will run out of them. To solve this problem, research has been conducted on alternative energy sources. One alternative energy source is nuclear energy. Although nuclear energy is a good solution to this problem, there are concerns.

All BUT ONE of these describe a concern about nuclear energy.

• presence of radioactive waste

• little if any carbon emissions released into the air

• contamination risk when transporting radioactive materials

• thermal pollution from water released into nearby environment

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Above is a bar graph showing how the average family uses water. Fresh water is a vitally important resource, and its supply is limited. Because of this limited supply, it is important for us to try and conserve water as much as possible.

Which drain on your water supply could you eliminate to help reduce water usage in your home?

• the "other" category

• the "leaks" category

• the "shower" category

• the "clothes washer" category

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Many cultures and religions have customs which deal with the way they use the land. For example, in Judaism, it is required that a field be left fallow (unplanted) every seventh year. What is one beneficial effect of customs like this?

• They prevent the land from being overused.

• They cause less competition among farmers.

• They make the land more valuable to farmers.

• They force people to farm more recklessly at other times.

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