For each question below, choose the letter corresponding to the BEST answer.

1		The total area drained by a stream and its tributaries is called the: Need a Hint?
			A)	drainage basin.
			B)	tributary area.
			C)	divide.
			D)	hydrologic cycle.
2		Stream erosion and deposition are controlled primarily by a river's: Need a Hint?
			A)	discharge.
			B)	channel shape.
			C)	gradient.
			D)	velocity.
3		The transfer of water among various reservoirs in the Earth system is: Need a Hint?
			A)	the water wheel.
			B)	water table.
			C)	hydrologic transfer mechanism.
			D)	the hydrologic cycle.
4		The headwaters of a stream are always located: Need a Hint?
			A)	at the terminus of the stream where it enters another body of water.
			B)	at the midpoint of the longitudinal profile of the stream.
			C)	at the source of the stream.
			D)	all of these
5		The largest drainage basin in the continental United States is: Need a Hint?
			A)	The Mississippi River drainage basin.
			B)	The Arkansas River drainage basin.
			C)	The Columbia River drainage basin.
			D)	The Missouri River drainage basin.
6		A stream's discharge is: Need a Hint?
			A)	influenced by channel width and depth, stream gradient, channel shape, and channel roughness.
			B)	the product of a stream's velocity and channel cross-sectional area.
			C)	the volume of water passing a fixed point per unit time.
			D)	all of these
7		The gradient of a stream that drops 10 feet over a horizontal distance of two miles is: Need a Hint?
			A)	2.5 feet per mile.
			B)	5 feet per mile.
			C)	10 feet per mile.
			D)	20 feet per mile.
8		In the United States, the standard unit of discharge used by the United States Geological Survey Water Resources Division is: Need a Hint?
			A)	meters per second.
			B)	cubic feet per second.
			C)	liters per minute.
			D)	cubic meters per second.
9		Hydraulic action, solution, and abrasion are all examples of: Need a Hint?
			A)	stream discharge.
			B)	stream transportation.
			C)	stream deposition.
			D)	stream erosion.
10		Cobble-sized particles are most likely to be transported as part of a stream's: Need a Hint?
			A)	Cobbles are too large to be transported by streams.
			B)	dissolved load.
			C)	bed load.
			D)	suspended load.
11		Sand bars deposited on the inner curve of a stream meander are called: Need a Hint?
			A)	point bars.
			B)	meander bars.
			C)	quick sands.
			D)	cutbanks.
12		Which of the following is not a drainage pattern: Need a Hint?
			A)	radial.
			B)	trellis.
			C)	dendritic.
			D)	all of these describe drainage patterns
13		A wedge-shaped mass of sediment deposited by a stream into a body of water is called: Need a Hint?
			A)	a delta.
			B)	a submarine fan.
			C)	an alluvial fan.
			D)	none of these
14		The average time between floods of a given magnitude is: Need a Hint?
			A)	the flood incidence.
			B)	the flood frequency.
			C)	the flood recurrence interval.
			D)	the flood stage.
15		By definition, a flood is: Need a Hint?
			A)	an interval of time during which a stream occupies its flood plain.
			B)	an interval of time during which stream discharge exceeds the capacity of the stream channel.
			C)	an interval of time during which stream velocity increases its discharge.
			D)	none of these is an adequate definition of a flood
16		In urban areas, floods often become more frequent because: Need a Hint?
			A)	storm sewers conduct runoff more efficiently to streams.
			B)	extensive pavement limits infiltration to soils.
			C)	extensive pavement increases runoff to streams.
			D)	all of these contribute to increase flooding in urban areas
17		A particular stream has a 47-year record of peak discharges available on the Internet. What is the recurrence interval of the 4th-ranked flood in this record? Need a Hint?
			A)	4 times every 100 years
			B)	10.75 years
			C)	188 years
			D)	12 years
18		Methods that have been used to control damage from floods include: Need a Hint?
			A)	construction of levees and flood walls along streams.
			B)	relocating entire communities out of flood plains.
			C)	construction of dams along streams.
			D)	all of these
19		Base level is: Need a Hint?
			A)	the level below which streams will not erode.
			B)	the level above which flood waters will not rise.
			C)	the normal elevation of a reservoir.
			D)	the level associated with the base of a river channel.
20		Besides Earth, what other planets show evidence of stream erosion? Need a Hint?
			A)	Mars
			B)	Jupiter
			C)	Venus
			D)	Mercury