Human Impact Review

Which environmental concern is Most Associated with Burning fossil fuels?

• global climate change

• pollution of ocean waters

• ozone layer destruction

• decrease in levels of atmospheric carbon dioxide

What will MOST LIKELY happen if the human population continues to grow at current rates?

• there will be fewer natural resources available for future generations

• there will be an increase in nitrogen levels in the atmosphere

• there will be a decrease in water pollution

• there will be a decrease in the number of strong hurricanes

Which is an example of an invasive species?

• native rattlesnake in the desert searching for prey

• the Kudzu vine introduced from Asia to help prevent soil erosion

• bacteria decomposing dead organic matter in any ecosystem

• algae that produces oxygen in freshwater systems and provides food

Which environmental factor would have the GREATEST impact on the pH levels of lakes in North Carolina?

• putting several different native species of fish into the lake

• beautification of the lake by planting flowers and bushes

• air pollution created in areas that are miles away from the lake

• increasing the size of the lake by cutting down trees and other vegetation

Which BEST explains how the greenhouse effect has caused a rise in global warming?

• increased production of carbon dioxide holds in heat and prevents it from escaping Earth's Atmosphere

• CFCs used in aerosol sprays have decreased the levels of radiation that enter Earth's atmosphere

• the thickening of the ozone layer has decreased the levels of UV radiation that reaches Earth's atmosphere

• oxygen produced by plants during photosynthesis absorbs radiation from the sun

From 1946-1964, the population in the USA experienced a "baby boom" as birth rates increased. In which way has this "baby boom" MOST NEGATIVELY impacted our global ecosystems today?

• the high birth rates increased the need for food, resulting in the over-hunting of wild game throughout the USA

• the high birth rates have had little impact on global ecosystems as they occurred solely in the USA and not throughout the world

• the high birth rates immediately impacted global ecosystems as greater food sources were required, but they no longer impact global ecosystems

• the high birth rates required increased use of fossil fuels, which has resulted in the continued release of damaging pollutants throughout global ecosystems

Which is the MOST LIKELY result if human population increases in an area?

• an improvement in water quality

• an increase in wildlife populations

• a destruction of ecological habitats

• a decrease in localized temperatures

If a person brings an invasive species into your community, why would more of that species be present by the time you are an adult?

• people will ignore its presence

• it will have lots of competition from native species

• it will receive more hours of sunlight than it did in its native environment

• the new environment will lack predators that would normally keep the population of the species under control

Which BEST explains the long term effect of increased carbon dioxide emissions?

• there will be decreased solar activity

• temperatures on Earth will decrease

• temperatures on Earth will increase

• less carbon dioxide will dissolve into oceans

Which human activity MOST LIKELY causes acid rain?

• using chlorofluorocarbons (CFCs)

• generating nuclear energy

• burning fossil fuels

• using pesticides