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
