Physical Geography: The Great Lakes Video

The 5 Great Lakes are the largest ______________ lake system on the planet.

• freshwater

• salt water

• sea water

• clear water

How were the Great Lakes primarily formed?

• Through volcanic eruptions

• By the movement of tectonic plates

• From receding (melting) glaciers during the last Ice Age

What two factors prevent (stopped) the Great Lakes from being classified as seas?

• Their freshwater composition and lack of tides

• Their elevation above sea level and lack of direct ocean connection

• Their size and the types of fish they contain

• Their geographical location and surrounding landmass

Native tribes and Europeans used the Great Lakes for ______________.

• transportation

• entertainment

• swimming

• sailing

Which of the Great Lakes is currently considered the largest by surface area?

• Lake Michigan

• Lake Huron

• Lake Superior

• Lake Ontario

What percentage of the world's freshwater is contained within the Great Lakes system?

• 10%

• 21%

• 35%

• 50%