Geography Ch. 4 - The Great Lakes

How were the Great Lakes created?

• by the damming of rivers

• by the clearing of forests

• by the melting of glaciers

• by the shrinking of oceans

Which term best fits:

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.

• Great Lakes food chain

• Great Lake habitat

• Great Lakes watershed

• Great Lakes freshwater ecosystem

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

• watershed

• basin

• landmass

• plateau

Which of the following suffered most from DDT poisoning in the Great Lakes region?

• tiny organisms

• large fish

• fish eating birds

• small fish

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

• point-source pollution

• wetland loss

• algae explosions

• invasive species

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

• where the pollution comes from

• how toxic the pollution is.

• what time of year the pollution occurs

• what animals are harmed by the pollution

Which of these is a major reason for a growing water shortage in many countries?

• habitat loss

• invasive species

• shrinking glaciers

• population growth

What problems may cause areas to receive way more rain or way less rain than typical?

• habitat loss

• pollution

• climate change

• invasive species

This invasive species can clog water pipes and affect water clarity.

• zebra mussel

• alewife

• pacific salmon

• asian carp

Asian carp are a threat to the Great Lakes. How are biologist protecting the Great Lakes from Asian Carp?

• other fish

• underwater electric gates

• poison

• medicine