6th Grade-Ch. 4-4.2

The Great Lakes were created by which of the following processes?

• Volcanic activity

• Tectonic plate movement

• Glacial erosion and melting

• Meteor impact

An ecosystem is?

• A group of similar species living in the same area

• A community of all living things and their environment

• A single species interacting with its environment

• A collection of different ecosystems in a region

Freshwater is defined as:

• Water with high salt concentration

• Water with no salt in it

• Water found in oceans

• Water used for industrial purposes

How has human activity changed the Great Lakes?

• Increased pollution levels, destroyed habitats and introduced invasive species

• Improved water quality

• No significant impact

• Decreased biodiversity

How many Great Lakes are there? Name them.

• Four: Superior, Michigan, Huron, Erie

• Five: Superior, Michigan, Huron, Erie, Ontario

• Six: Superior, Michigan, Huron, Erie, Ontario, Champlain

• Three: Superior, Michigan, Huron

What is unique about Lake Michigan?

• It is the largest freshwater lake in the world.

• It is the only Great Lake located entirely within the United States.

• It is the deepest lake in North America.

• It is the only lake with saltwater.

The Great Lakes have what impact on the world's freshwater?

• They are largest group of freshwater lakes on earth

• They have no significant impact on the world's freshwater.

• They are the largest source of saltwater in the world.

• They contribute to 50% of the world's freshwater supply.

What impact do the Great Lakes have on society?

• They provide a source of fresh water, economic activity, provide electric power.

• They are primarily used for recreational activities only.

• They have no significant impact on the environment or economy.

• They are a major source of saltwater fishing.

A watershed is defined as:

• A region or area bounded that includes all the land and water ways that drain into a body of water.

• A large body of water surrounded by land.

• A small stream or river that flows into a larger one.

• An area of land that is always dry and never experiences rainfall.

Why is freshwater important?

• It is essential for survival.

• It is not necessary for human survival.

• It is only used for industrial purposes.

• It is abundant and easily accessible everywhere.