Human Impact on the Environment Review Questions

How can urbanization affect a local area?

• It can increase the number of invasive species in an area.

• It can decrease the risk of water pollution in an area.

• It can increase the risk of flooding in an area.

• It can decrease the need for natural resources in an area.

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Which is a farming technique that could improve the soil and the environment?

• using fueled machines that will turn the soil continuously

• creating undisturbed layers of mulch in the soil

• placing inorganic chemical fertilizers in the soil

• irrigating the soil with salty water

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Which is the most common contamination source for freshwater resources?

• runoff

• digging wells

• melting of glaciers

• lightning

A community decides to upgrade its water purification and management systems. What lasting impact could this have on available freshwater?

• It could cause a decrease in water demand.

• It could cause a decrease in the water levels.

• It could cause an increase in waterborne diseases.

• It could cause an increase in the freshwater supply.

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Which is associated with an increase of chlorofluorocarbons in the environment?

• an increase in health risks associated with UV radiation

• an increase in levels of methane gas in the atmosphere

• an increase in ozone levels in the upper atmosphere

• an increase in acid precipitation

What long-term impact could the destruction of large areas of forests have on Earth?

• decreased rates of erosion

• increased atmospheric carbon dioxide levels

• decreased amounts of acid rain

• increased atmospheric oxygen levels

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Why is it important to conserve the biodiversity of Earth?

• to decrease the amount of global predator populations

• B to decrease the stability of major global ocean currents

• to increase the stability of ecosystems during environmental changes

• to increase the amount of nonrenewable resources located in the lithosphere

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How could the introduction of a nonnative species of plant affect an ecosystem in North Carolina?

• It could pollinate the native plant species, producing a disease-resistant species.

• It could reduce the competition for space and light with native plant species.

• It could take over the habitats of the native plant species.

• It could cause some insect species to destroy native plant species.

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Which change would best aid a farmer in making the transition from conventional farming techniques to more sustainable farming techniques?

• reduce the ratio of essential elements in the fertilizer

• irrigate crops using well water

• rotate the types of crops grown

• plant only genetically modified crops

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Which would most likely cause a reduction in the amount of coal and natural gas on Earth?

• a continual increase in the amount of pollution in Earth’s atmosphere

• a continual increase in the number of people on Earth

• a continual decrease in the amount of water in Earth’s aquifers

• a continual decrease in the amount of rain forests on Earth