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12 Cards in this Set
- Front
- Back
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Great Lakes make up ___% of world's fresh water
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18%
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chemicals introduced to Great Lakes
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1920s PCBs
1940s DDTs 1950s Phosphorus |
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When was Great Lakes Water Quality Agreement made
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1972
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one of the main polluters of lakes?
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groundwater seepage
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3 types of water level fluctuation
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seasonal
short term long term |
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seiche
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is a standing wave that oscillates in a lake as a result of seismic or atmospheric disturbances creating huge fluctuations of water levels in just moments
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lakes layers
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epilimnion - warm surface
thermocline - middle hypolimnion - cold lower layer |
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When and where was the first sulfite paper mill
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Welland canal, 1860s
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When were Erie canal, welland canal, and St. Lawrency Seaway complete
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1825 - Albany to Buffalo
1829 1959 |
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what products are most shipped by these canals today
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iron, ore, grain, coal
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When did Commercial fishing begin
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1920
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what was the impact of recreational activities in great lakes
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loss wetlands
shoreline erosion flooding threaten ecosystem |
