The key insight of ecosystems ecology was to recognize that energy ______ they system, and materials ________ the system
Fill in the blank(s) with the appropriate word(s).
Answer: flows through, cycle within
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One class of pollutants that can cause excessive growth of algae is
a. radioactive substances b. oxygen-demanding wastes c. plant nutrients d. organic chemicals e. Sediment
The "Classical" civilization in the Americas was the
A. Cherokee B. Cahokia C. Mayan D. Patagonian
In a ________ plate boundary, lithosphere is neither created nor destroyed. Fill in the blank(s) with the appropriate word(s)
To compare the scale of Europe to that of North America, draw a circle 500 miles (800 kilometers) around Frankfurt, Germany. Then do the same for Chicago. This distance is about a day's journey by car from each of the two cities
What does this exercise tell you about the differences in scale and social geography between the two regions?