Chapter 4: The Great Lakes- The US and Canada'sFreshwater Treasures

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

1

there are more than ___ invasive species in the Great Lakes

170

In ___, the United States and Canada created the first Great Lakes Water Quality Agreement, pledging to clean up and protect the Great Lakes ecosystem.

1972

How many lakes make up the Great Lakes?

5

almost __% of the original forests of the GL are gone

50

which lake is the largest and deepest?

Superior

what are the five lakes of the Great Lakes region?

Superior, Michigan, Heron, Eerie, and Ontario

___ has exploded in the Great Lakes due to phosphorus in laundry suds

algae

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

The Great Lakes were created by the movement of _____

ice

regulations on ballast water ______ invasive species

keep out

habitats are lost by the expansion of ____

logging, factories, cities, and development

freshwater

made up of water that is fresh, not salty. This term is also used to describe creatures that live in fresh water, such as freshwater fish

runoff is a ___ source pollution

non point

Pollution that does not come from a single location is called ___

non-point-source pollution

invasive species

nonnative plants and animals that invade an ecosystem

sewage and treatment plants are ___ source pollution

point

non-point-source pollution

pollution that does not come from a single location, but rather from many sources such as runoff from farms

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

runoff

SMHEO (helps remember order of lakes)

such money he earns often

food web

the feeding relationships within an ecosystem. Each living thing in a food web provides food energy to other living things within that ecosystem

t or f? Unsafe drinking water can carry deadly diseases

true

t or f? Watersheds include all land and waterways that drain into a body of water

true

t or f? barriers keep out invasive species

true

t or f? builders in some areas are required to restore wetlands to replace what they destroy

true

t or f? habitats are protected by low impact logging, replanting of trees, and creating nature preserves

true

t or f? invasive species have already damaged the Great Lake's ecosystem

true

t or f? more people are moving to the GL, putting pressure on habitats

true

t or f? native fish are beginning to recover

true

t or f? people dump toxic gases into the lakes

true

t or f? water shortages are causing conflict all over

true

t or f? laws are being made about pollution and people are working on cleaning it up

true

t or f? wetlands are being protected

true

runoff

water from rainfall that is not absorbed into the soil and instead flows into streams or lakes

point-source pollution

water pollution from a single place, such as a discharge pipe at a plant that treats sewage

food chain

a series of plants and animals, each of which depends on the one below it for food. A food chain usually forms part of a much larger food web

Which of the following is true about the Great Lakes ecosystem? A. It has the largest freshwater ecosystem in the world. B. It has the smallest saltwater ecosystem in the world. C. It has the deepest lakes in the world. D. It has the warmest lakes in the world.

A. It has the largest freshwater ecosystem in the world.

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

Asian Carp

__ has caused eagle egg shells to become too thin to survive

DDT

because of pollution being carried to Lake ___, the Cuyahoga River burned in 1969

Eerie

which lake is the shallowest?

Eerie

which lake is completely in the US

Michigan

which lake is the smallest in size?

Ontario

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

PCBs and DDT in the food chain declined

watershed

a geographic area that includes all of the land and waterways that drain into a body of water. Sometimes a watershed is also called a drainage basin

____ might cause less rainfall to resupply fresh water in an area

climate change

ecosystem

community of all the living things in an area and the environment in which they live

governments have introduced new species, like the Pacific salmon, to ___ invasive species

control

all the organisms are ____ on each other to survive

dependent

more than half of the GL wetlands have ____

disappeared

If a fish in the Great Lakes is poisoned, what is affected?

everything

t or f, public and private groups are not creating nature preserves on existing wetlands

false

t or f? GL forests are now shrinking instead of expanding

false

t or f? mercury is nowhere to be found in the air

false