The source of all wave motion is a
A) wave pattern.
B) harmonic object.
C) vibrating object.
D) region of variable high and low pressure.
E) none of the above
C
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By mapping population density, the concentration of rivers, and the gradient of streams using GIS, geographers were able to
A. determine the highest risk areas for river blindness in Mozambique. B. predict the outcome of the soccer World Cup competition in 2010. C. suggest the best areas for whitewater rafting in South Africa. D. locate sources of water for irrigating deserts.
Prior to WWII, people living in cities in the United States enjoyed
A) a housing boom. B) more widespread use of walking, bicycles and public transportation. C) increasing quality of public housing. D) improving air quality.
During the earliest colonial era, which took place under mercantilism, what were the primary colonial powers?
A) Britain and France B) Britain and Germany C) France and Italy D) Portugal and Italy E) Portugal and Spain
As we go below the euphotic zone of the open ocean and into greater depths, ________.
A. carbon dioxide increases with depth B. photosynthesis increases with depth C. respiration decreases with depth D. oxygen increases with depth E. None of these is correct