A positive curvature value means an upwardly ________ surface and a negative curvature value means an upwardly ________ surface:
A. convex, concave
B. concave, convex
Answer: A
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Sea level could change relative to a shoreline due to:
a. uplift of coastal regions. b. subsidence of coastal regions. c. rising sea level. d. receding sea level. e. all of the above
The cleanup of hazardous waste accumulated in orphan sites is complicated because
A) most of the waste is buried below the water table. B) there is no responsible party to clean up the waste. C) the chemicals have evaporated before they could be removed. D) there are no longer places available to dispose of hazardous wastes.
The richest fishing areas of the world are mostly located ________.
A. in waters where coral reefs are common B. in waters where equatorial upwelling takes place C. in waters where coastal upwelling takes place D. in waters around Antarctica and in the Arctic E. in open waters far from coasts
The most persistent problem in Africa's political geography is the low literacy levels across the continent
a. True b. False Indicate whether the statement is true or false