Name at least three reasons explaining why the Great Lakes suffer from water pollution.
What will be an ideal response?
1. Low flow rate - only 1% of the lake's water flows out via the St. Lawrence River each year.2. Invasive species.3. Untreated sewage.4. Point- source pollution (industrial pollution)5. Non-point source pollution (runoff, atmospheric deposition of pesticides).
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The U.S. Census Bureau offers KML files of nation-based and state-based boundaries for download. What is the main application of these files?
What will be an ideal response?
The continental crust of the Pacific Northwest and Alaska are much different from the rest of the United States. What process would account for these varied differences?
A ________ is a geographic low, which marks the location where oceanic lithosphere descends into the mantle
A) fold and thrust mountain B) deep-ocean trench C) seismic zone D) mid-ocean rift
In terms of food chains, which of the following is a producer?
A. grass B. giraffe C. beetle D. salmon