world geography

The percentage of the Earth's water that is able to meet human needs is around

1%

What happened in 1972 that helped protect the Great Lakes?

The Great Lakes Water Quality Agreement was created.

What could cause some areas to get more or less rainfall than they do today?

global warming

What is a major threat to China's water supply?

growing population

A natural environment in which a plant or animal lives is called a

habitat

What is the greatest threat to wetland habitats in the Great Lakes region?

human development

Great Lakes were created by the movement of

ice

Which of the following is true about the Great Lakes ecosystem?

it has the largest freshwater ecosystem in the world

Pollution that does not come from a single location is called

non- point source pollution

which species was introduced to the Great Lakes to reduce the invasive species of alewives?

pacific salmon

What could cause a toxic chemical in the soil to make its way into streams and lakes?

runoff

what is DDT?

something that kills insects

true or false: Cuyahoga river fire in 1969

true

true or false: unsafe drinking water can carry deadly diseases

true

This invasive species poses a huge threat to native species as well as boaters and water skiers. It is called the

Asian carp

which U.S. city sits next to the Great Lakes

Chicago

What was a result of the new laws to protect the Great Lakes?

PCBs and DDT in the food chain declined.

How many lakes make up the Great Lakes?

five

If a fish in the Great Lakes is poisoned, which of the following is likely to be affected?

food chain, food web, ecosystem