Human Impact on the Environment

Front

Which human activity is most likely to contribute to soil erosion?

Back

Clearing land for farming

Front

Which of the following is one way to preserve land resources?

• Reduce urban sprawl
• Clear cutting trees to increase land for farming
• Only build one park per city
• Only build recycling factories in the biggest cities

Back

Reduce urban sprawl

Front

How could reforestation benefit a community?

Back

It rebuilds forests, which provide shelter to animals, plants and other resources.

Front

How can ground pollutants affect the local fresh water supply?

Back

Erosion of soil causes those chemicals to leak into the ground water supply and end up in lakes and rivers

Front

What is the most effective method to slow down the destruction of certain species of birds and small mammals from over hunting?

Back

Regulate the number of animals that can be hunted in a certain area at certain times

Front

What is most likely to cause desertification?

Back

Lack of vegetation causing increased soil erosion, which displaces water from a region

Front

What happened several years after rabbits were introduced into Australia in the 1800s?

Back

The rabbits began to overpopulate greatly.

Front

A toxin that breaks down slowly is introduced into the environment through the spraying of insecticides. The toxin is very lethal when an organism receives high levels of it. Which organism in the food web is in the most danger? Options: Grass, Rabbit, Fox, Fish

Back

Fox

Front

Poisons such as DDT build up in lakes and streams due to runoff. Then they enter the food chain. Once in living organisms, the poisons are not broken down and their concentrations increase as they are passed along the food chain. Which term best describes this ecological phenomenon?

Back

biological magnification

Front

Biological Magnification

Back

The buildup of non-biodegradable chemicals in consumers as they are passed up the food chain