The direction of ground-water flow between any two locations in an aquifer is determined by comparing the total ________ of the water at each location
A) elevation
B) pressure
C) energy
D) volume
Answer: C
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Four of the following are benefits that coral reefs provide. Which one is the exception?
A. They provide significant free oxygen. B. They serve as natural barriers. C. They protect coastlines from erosion. D. They provide habitats for one-quarter of all marine organisms. E. They provide one-tenth of the global fish catch.
With what historical period did the most active period of canal-building coincide?
A) the end of the Bronze Age B) the Civil War Era C) just before World War I D) the middle of the Renaissance E) the beginning of the Industrial Revolution
Which of the following is true regarding the specific heat of land and water?
A) Water can hold more heat energy than a comparable volume of rock. B) The temperature of water will rise faster than that of land when exposed to the same amount of insolation. C) Land surfaces have a higher specific heat than water surfaces. D) Land and water have very similar specific heat values.
The duration of a TLV/STEL exposure is _____ minutes.
a. 90 b. 60 c. 15 d. 30