Great Lakes

Front

How were the Great Lakes created?

Back

by the melting of glaciers

Front

Which term is best defined as a geographic area that includes all of the rivers and streams that flow into a lake or sea?

Back

watershed

Front

Which of the terms below best fits what is being described? Insects feed on the algae and plants that grow in the Great Lakes. Tiny fish eat the insects. Larger fish feed on the small fish. Eagles and otters eat the larger fish.

Back

Great Lakes food chain

Front

Which of the following suffered most from DDT poisoning in the Great Lakes: fish-eating birds, large fish, small fish, tiny organisms?

Back

fish-eating birds

Front

The sea lamprey and zebra mussel are part of which of these Great Lakes ecosystem problems?

Back

invasive species

Front

Which conclusion about Michigan is best supported by the graph above?

Back

Housing areas are expanding.

Front

What is the main difference between point-source and non-point-source pollution?

Back

where the pollution comes from

Front

Which of these is a major reason for a growing water shortage in many countries? habitat loss, invasive species, shrinking glaciers, population growth

Back

population growth

Front

Why are the Great Lakes often called “the fourth seacoast”?

Back

Because the Great Lakes are so large that they look and act like oceans.

Front

Which of the following is a cause of habitat loss in the Great Lakes?
- loss of forests and wetlands to industrial activity
- introduction of invasive species
- the harm DDT inflicts on birds
- how smaller watersheds drain into larger watersheds

Back

loss of forests and wetlands to industrial activity