Meandering streams have semi-circular cross-sections along most of their length. Indicate whether the statement is true or false
F
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Explain why upwelling occurs along the California coast.
What will be an ideal response?
Sea level is constant over long periods of the earth's history, and that is why it is used as a major datum for mapping elevations
Indicate whether the statement is true or false
When examining the Keeling Curve in the accompanying graph, one notices a "zigzag" upward-moving curve. What do these small up and down movements indicate?
A) weather-related factors affecting CO2 B) seasonal cycles in CO2 concentrations C) O2 versus CO2 concentrations D) latitudinal differences in CO2 concentrations E) uncertainty in the CO2 conditions
In the past few decades, the Mexican economy has slowly become __________ and more focused on the private sector.
a. less centralized b. more centralized c. the largest of NAFTA nations d. less diversified e. centered on primary output