Human Impact Quiz Review

Car manufacturers have begun to explore the use of biofuels, such as biodiesel, ethanol, and cooking oils made from plant material. The desired outcome of using these biofuels would be

• a decrease in the use of fossil fuels

• a decrease in the release of oxygen gas

• an increase in abiotic resources

• an increase in global warming

A human activity that could significantly decrease the amount of carbon dioxide in the air is

• increasing the use of fossil fuel

• controlling insect pests that eat stored grain

• burning garbage and trash to generate electricity

• preserving and expanding forest habitats that shelter wildlife

What will the continued depletion of the ozone layer most likely cause?

• an increase in skin cancer among humans

• a decrease in atmospheric pollutants

• an increase in marine ecosystem stability

• a decrease in climatic changes

One possible reason for the rise in the average air temperature at Earth’s surface is that

• decomposers are being destroyed

• deforestation has increased the levels of oxygen in the atmosphere

• industrialization has increased the amount of carbon dioxide in the air

• growing crops is depleting the ozone shield

Deforestation will most directly result in an immediate increase in

• atmospheric carbon dioxide

• atmospheric ozone

• wildlife populations

• renewable resources

Which factor is a major cause of global warming?

• increased burning of fuels

• increased number of green plants

• decreased mineral availability

• decreased carbon dioxide in the atmosphere

Global warming has been linked to a decrease in the

• size of the polar ice caps

• temperature of the Earth

• rate of species extinction

• rate of carbon dioxide production

Increased industrialization will most likely

• decrease available habitats

• increase environmental carrying capacity for native species

• increase the stability of ecosystems

• decrease global warming

In some parts of the world, forests are being cut down and burned to clear land for new homes and new farmland. A negative effect of these activities might be

• an increase in global warming

• destruction of the ozone shield

• a decrease in the average temperature of the atmosphere

• an increase in biodiversity of the deforested areas

Car exhaust has been blamed for increasing the amount of carbon dioxide in the air. Some scientists believe this additional carbon dioxide in the air may cause

• global warming

• increased biodiversity

• habitat preservation

• ozone destruction