Introduction
The Great Lakes were carved out of the earth by glaciers
during the last ice age - about 20,000 years ago. They have a tremendous
impact on many people's lives and health.
The Great Lakes ecosystem is constantly exposed to
new imbalances imposed by humans. The lakes serve as transportation
for ship and barge traffic. The ships and barges often carry animals
and plants from other places into the lakes.
Many cities and farms border the lakes. Fertilizers
and weed killers get into the lakes by running off from these farms
and cities.
The water quality of the lakes is directly affected
by human activities. Because the lakes are so large, they have
a significant impact on local weather.
What's in this section?
- Name the Great Lakes.
- Determine the distance from student's residence to the Great
Lakes.
- Define "alien" (introduced) species.
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- Interpret color-coded maps of Great Lakes data.
- Graph monthly rainfall data obtained from a chart.
- Determine the effects that imported species have on native animal
and plant populations.
- Determine the relationship between the length of time wind has
blown over water and the height of waves.
- Write a paragraph describing Zebra mussels' economic influences.
- Determine steps necessary to ensure the recovery of the Great
Lakes' ecosystems.
- Click on the link above to participate in some
additional activities.
- Click on "Links Only" to access a list of all the external sites
used in this activity.
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