Cracks where very little or no displacement of rock has occurred are called
A) faults.
B) sills.
C) joints.
D) dikes.
Answer: C
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What is the principle behind wetlands-based sewage treatment systems?
A. To mimic natural processes in a series of tanks filled with aquatic plants. B. To use high strength chemicals to disinfect large amounts quickly. C. To let nature take care of it by dumping raw sewage in rivers. D. To simply pour sewage into existing, unlined natural wetlands.
Which of the following is true about the vector data model?
A. The model is also called the discrete object model. B. The model uses x-, y-coordinates to store the geometry of spatial features. C. The model is also called the discrete object model and uses points, lines, and polygons to represent simple spatial features. D. The model uses points, lines, and polygons to represent simple spatial features. E. All of these are correct.
Which of the following present-day observations of crustal movement in formerly ice covered regions of North America and Eurasia support the flexural isostasy hypothesis?
A) Originally depressed areas rose to their original position by the time the ice finished melting. B) Originally depressed areas are still rising and the bulges are stationary. C) Originally depressed areas are still rising and the bulges are sinking. D) Originally depressed areas are sinking and the bulges are rising.
The rising global demand for food has recently been met by ________
A) an increase in per-acre crop yields B) switching to a diet high in fish and seafood, which do not require cropland C) cultivating more land D) decreasing the per-capita amount of food available