Human and Earths Resources

Which activity is the most direct use of land as a natural resource?

• Growing plants in soil

• Getting energy from sunshine

• Breathing air

• Drinking water

The map shows where a few resources can be found within the continent of Africa. Which statement is best supported by the evidence on the map?

• Oil is produced mostly in the southern part of Africa.

• Each country in Africa has about the same amount of each natural resource.

• Gold is found in every country in Africa.

• Iron ore is found mostly in northern Africa.

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Which resource is nonrenewable?

• Cattle

• Soybeans

• Sunlight

• Copper

Biomass is considered an 'alternative' energy resource. This means that it can be used instead of a fossil fuel. In which way is biomass similar to fossil fuels?

• Both depend on the weather.

• Both are burned for energy.

• Both are easily replenished.

• Both can be quickly made from corn.

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One cell phone contains many metals, including about 25 g of aluminum, about 15 g of copper, about 0.03 g of gold, and about 0.3 g of silver. Based on this information, which resource is most likely used to make cell phones?

• An underground deposit of minerals

• An old-growth forest of tall trees

• A farm with sheep and cattle

• A large river and its streams

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Which type of energy resource is most dependent on weather conditions?

• Solar energy

• Geothermal energy

• Nuclear energy

• Fossil fuels

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As the human population grows, the size of cities increases. As cities grow, more land must be cleared to make way for homes, businesses, and roads. Which two events would be likely effects of replacing a forested area with an urban area?

• More air pollution because there are fewer trees to take in carbon dioxide

• Fewer birds and other wildlife because they have fewer places to live

• More trees because of increased solar energy in the area

• Less erosion of soil as plants covering the ground are added to gardens

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A farmer grows wheat near a river. He frequently uses fertilizer on his fields, and when he waters the fields, excess water runs off into the river. What should the farmer be most careful to monitor to determine his farm's impact on water quality?

• Type of fish in the river

• Amount of water in the farm's soil

• Level of nitrates in runoff water

• pH of rainwater falling on the farm

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Imagine you are in charge of helping a town named Greenville choose the form of energy best suited to the needs and preferences of its citizens. Use this information to help you make a decision: • The people of Greenville want to reduce their production of greenhouse gases. • The people of Greenville do not want to risk harming any fish or wildlife. • Greenville has a large amount of land available, but no large rivers. • Greenville is sunny for much of the year. Which form of energy would best suit Greenville's needs and preferences?

• Solar power

• Natural gas

• Hydropower

• Coal

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Imagine that you live in a city near a large river. You are part of a group that is studying the environmental impact of switching your city from fossil fuels to hydropower. Which two issues are possible consequences that you should consider?

• Danger to birds that live in your region

• Decrease in carbon dioxide production

• Harm to fish and other organisms in the river

• Toxic waste created by nuclear reactions

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