Which of the following is true of the ocean deep zone?
A) temperatures remain approximately 4 degrees C (39 degrees F) within most of this layer
B) the water in this zone does not freeze because of the intense pressure exerted by the weight of overlying water
C) the water in this zone does not freeze because of it's salinity
D) all of the above
Answer: D) all of the above
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Turbulent flow in a stream is likely to be least in
A group of organisms and the nonliving physical and chemical environment in which they interact is
A) a biosphere. B) an ecosystem. C) a closed system. D) a vernacular region.
What is the mostly likely setting for this drainage pattern? 
A. The rocks have a relatively equal resistance to erosion. B. The area has folded or faulted rocks with different resistances to erosion. C. A volcano once existed here but has been partly eroded away. D. Drainages have followed a series of fractures that branch off of one another.
Which of the following terms refers to rain with a pH of 5.6?
A. polluted B. acidic C. neutral D. alkaline