Unit #1 - Ch 1 and 20

Evidence of biodiversity is seen in the

• genetic variation among human populations.

• number of species in a region.

• number of ecosystems and habitats in a region.

• variety of nutrients available in a region.

• All of these answers are correct.

The health of frog populations is used as an indicator of environmental health because frogs

• are exposed to the water.

• are amphibious.

• eat insects which are very low on the food chain.

• live in the tropics.

• may ingest toxins on land.

The concentration of carbon dioxide in the atmosphere

• is increasing in part due to fossil fuel use.

• has not significantly changed in the past 200 years.

• is increasing in part due to deforestation.

• has been decreasing since the 1800’s.

• both a and c.

Human population today is closest to

• 3 billion

• 6 billion

• 5 billion

• 7 billion

• 12 billion

Economic development goes hand in hand with

• decreased use of non-renewable resources.

• increased consumption of resources.

• smaller more efficient living styles.

• better planting strategies for crops.

• sustainable use of renewable resources.

Calculating ecological footprint involves consideration of

• the impact of activities on the resources of Earth.

• lifestyle

• water usage for crops and direct consumption.

• food calories required for continuing normal activity.

• All of these answers are correct.

The death of a billion fish in the Neuse River of North Carolina in 1991 was caused by

• sediment

• bacteria

• overfishing the food source of the fish.

• Pfiesteria.

• acid rain

The study of environmental science differs from study of the natural sciences such as biology and chemistry because it

• doesn’t encourage critical thinking.

• isn’t included in most institutions of higher learning.

• involves politics, law and economics.

• eliminates the consideration of physics.

• doesn’t take into account the scientific process.

Controlled experiments in nature are difficult because

• it is impossible to determine what kind of conditions are needed for the experiment.

• large amounts of land are sometimes required to produce natural conditions.

• animals cannot be studied because they do not stay still.

• scientists do not like to do the fieldwork required.

• Both a and b.

Environmental justice is

• the body of law that deals with environmental issues.

• the type of legal system that environmental lawyers use to defend nature.

• a social movement that works toward equal enforcement of environmental laws in poor communities.

• a type of legal punishment for polluters.

• not needed because pollution is equitably distributed around the world.