1 Which factor is not considered by ecologists when they evaluate the impact of human activities on an ecosystem?

(1) amount of energy released from the Sun
(2) quality of the atmosphere
(3) degree of biodiversity
(4) location of power plants

1         2         3         4        

2 A new type of fuel gives off excessive amounts of smoke. Before this type of fuel is widely used, an ecologist would most likely want to know

(1) what effect the smoke will have on the environment
(2) how much it will cost to produce the fuel
(3) how long it will take to produce the fuel
(4) if the fuel will be widely accepted by consumers

1         2         3         4        

3 Chittenango Falls State Park in central New York State is the only known habitat for an endangered species of aquatic snail. Contamination of its water supply and reduction of its habitat have threatened the future of this snail. Which step could be taken to protect this species of snail?

1 banning human activities that damaged the habitat
2 introducing a new snail predator into the habitat
3 transferring the snail to a terrestrial environment
4 crossbreeding the snail with another species

1         2         3         4        

4 When humans use more ground water for industry than is being replaced, the soil above the ground water may collapse and disrupt natural habitats. This human activity is an example of

1 species exploitation
2 renewal of natural resources
3 a disposal problem
4 poor use of finite resources

1         2         3         4        

5 Which human activity has probably contributed most to the acidification of lakes in the Adirondack region?

1 passing environmental protection laws
2 establishing reforestation projects in lumbered areas
3 burning fossil fuels that produce air pollutants containing sulfur and nitrogen
4 using pesticides for the control of insects that feed on trees

1         2         3         4