What is the definition of a turbidity current?

A) Subsidence of the seafloor
B) Fast-moving water created by density differences
C) Submarine landslide
D) Focused jet of water blasting across the shelf from a surface stream


Answer: C

Environmental & Atmospheric Sciences

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Which of the following is NOT a characteristic of early world-empires?

A) colonialization B) agriculturally based economy C) use of religion and/or the military to control subjects D) distribution of wealth from the upper classes to the lower classes

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More than ________ percent of all trips within U.S. cities are made by car

A) 95 B) 99 C) 68 D) 25 E) 33

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Graded bedding forms when ____

A)erosion degrades a portion of the sea bottom B)sediment is deposited on a steep slope C)turbidity currents deposit coarse and then fine sediments D)cross-bedding erodes and re-lithifies E)gentle wave motion moves particles toward the shoreline

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Computer-based weather forecasts

A) are completely automated and require no intervention by human forecasters. B) are mostly unreliable and are little-used by human forecasters. C) provide important guidance to human forecasters. D) are only used in specific, hurricane-prone areas.

Environmental & Atmospheric Sciences