MULTIPLE CHOICE. Choose the one alternative that best completes the statement or
ID: 154924 • Letter: M
Question
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) What is the role of a drainage basin? 1) A) A drainage basin is very impermeable soil, where flood waters are held and eventually evaporate instead of going into a river. B) A drainage basin is a set of underground tunnels that drain water into the ocean. C) Rivers empty into a drainage basin, which represents a lake or the ocean. D) A drainage basin is very permeable soil into which flood waters seep instead of going into a river. E) A drainage basin is the area drained by a river and all of its tributaries. 2) In which cycle do rivers NOT play an important role? 2) A) hydrologic cycle B) biogeochemical cycle C) tectonic cycle D) rock cycle 3) Which rivers have the highest gradient? 3) A) Rivers near the ocean B) Rivers near their base level C) Rivers in gentle valleys D) Rivers moving down mountains 4) Which of the following is NOT an example of a base level for a river? 4) A) Rapids B) Reservoir C) Lake D) Ocean 5) What would the longitudinal profile of a river flowing from a gentle valley into an ocean look like? A) A steeply upward sloping line B) A gently upward sloping line C) A steeply downward sloping line D) A gently downward sloping line E) An upward sloping and then downward sloping line 5) 6) What is the floodplain? 6) A) Earthen mounds that run parallel to the river and hold in the water during floods B) A triangular shaped deposit that forms when a river flows into the ocean C) The steep sides of the river channel that holds in the water D) A flat area next to the river carved out by the rivers E) The area around a river that is the ultimate limit to how far it will ever flood 7) Which of the following loads are most likely to consist of heavy rocks and boulders? 7) A) Bed load B) Suspended load C) Buoyant load D) Dissolved load E) Structural load 8) Which of the following loads would make a river appear murky or dirty? 8) A) Suspended load B) Buoyant load C) Bed load D) Structural load E) Dissolved load 9) If you dip a glass of water into a river and passed the water through a very fine sieve that blocked all sediment grains from passing through, what will you be left with? A) Suspended load B) Structural load C) Bed load D) Dissolved load 10) If you were running water through a hose, how would you increase the discharge of water coming from the hose? A) Connect the hose to a sprinkler B) Turn up the water at the faucet C) Connect the hose to a spray gun D) Hold your finger over half of the opening in the hose 9) 10) 11) Choose the best answer. Which would increase during a flood, discharge or velocity? 11) A) Neither discharge or velocity because the stream will be doing more erosion during a flood B) Neither discharge or velocity because both are constant for any given stream C) Discharge only because there is more water flowing D) Both discharge and velocity will increase because there is more water flowing and it is flowing faster. E) Velocity only because the water is flowing faster 12) What happens to rivers when they reach their base level? 12) A) They erode sediment. B) Their discharge decreases. C) They fill the bottom of a v-shaped valley. D) They often form alluvial fans or deltas. 13) Where does a meandering river run the fastest? 13) A) On the outside of a bend B) All parts of a meandering river run at similar speeds. C) On the inside of a bend D) Near the point bars 14) What is avulsion? 14) A) A river overflows and completely fills the floodplain. B) A river shifts its position after a flood. C) A river deposits sediment and creates a fan-like structure. D) A river overflows its banks and leaves pools of water behind in the floodplain. E) A river turns and moves in the opposite direction due to uplift caused by a fault. 15) Where on a river would you most likely find point bars? 15) A) In the center of the river B) At the mouth of the river C) At the headwaters of the river D) On the outside of a bend E) On the inside of a bend 16) Where on a river would you most likely find cutbanks and why? 16) A) On the outside of a bend because that is where the river erodes most. B) At the bottom of the river because that is where it moves the fastest. C) On the outside of a bend because that is where the river deposits most. D) On the inside of a bend because that is where the river deposits most. E) On the inside of a bend because that is where the river erodes most. 17) Which of the following will tend to REDUCE the size of a river flood? 17) A) High amount of precipitation in a drainage basin B) High amount of moisture in the soil (water-saturated soil) C) Fast rate at which the runoff moves towards the river D) High rate at which the precipitation soaks into the ground 18) In which of the following cases would you expect the LEAST amount of flooding due to a rainstorm? Assume all areas receive similar amounts of rainfall in the rainstorm and there are no flood control measures in any of the areas. A) A city with many houses, paved roads, and sidewalks B) An area where soil is already saturated due to previous recent thunderstorms C) A short duration rainstorm falling on an area that is typically very dry such as a desert D) A long duration rainstorm falling on an area that consists of forest, grasslands, and no human development. E) An area where the ground is frozen 18) 19) What is the stage of a river? 19) A) Elevation of the top of the river valley B) Height of water that is flowing C) Length of the river D) Age of the river E) Volume of water that flows past a point over time 20) What two parameters are plotted in a hydrograph? 20) A) Stage vs. gradient B) Cross-sectional area vs. stage C) Stage vs. elevation D) Velocity vs. discharge E) Discharge vs. time
Explanation / Answer
Q (1) What is the role of a drainage basin?
E) A drainage basin is the area drained by a river and all of its tributaries.
Q (2) In which cycle do rivers NOT play an important role?
C) Tectonic cycle.
Q 3) Which rivers have the highest gradient?
D) Rivers moving down mountains.
Q 4) Which of the following is NOT an example of a base level for a river?
A) Rapids.
Q 5) What would the longitudinal profile of a river flowing from a gentle valley into an ocean look like?
D) A gently downward sloping line.
Q 6) What is the floodplain?
D) A flat area next to the river carved out by the rivers.
Q 7) Which of the following loads are most likely to consist of heavy rocks and boulders?
A) Bed load
Q 8) Which of the following loads would make a river appear murky or dirty?
A) Suspended load.
Q 9) If you dip a glass of water into a river and passed the water through a very fine sieve that blocked all sediment grains from passing through, what will you be left with?
D) Dissolved load.
Q 10) If you were running water through a hose, how would you increase the discharge of water coming from the hose?
B) Turn up the water at the faucet.
Q 11) Which would increase during a flood, discharge or velocity?
D) Both discharge and velocity will increase because there is more water flowing and it is flowing faster.
Q 12) What happens to rivers when they reach their base level?
A) They erode sediment.
Q 13) Where does a meandering river run the fastest?
A) On the outside of a bend.
Q 14) What is avulsion?
B) A river shifts its position after a flood.
Q 15) Where on a river would you most likely find point bars?
E) On the inside of a bend.
Q 16) Where on a river would you most likely find cutbanks and why?
A) On the outside of a bend because that is where the river erodes most.
Q 17) Which of the following will tend to REDUCE the size of a river flood?
C) Fast rate at which the runoff moves towards the river
Q 18) In which of the following cases would you expect the LEAST amount of flooding due to a rainstorm? Assume all areas receive similar amounts of rainfall in the rainstorm and there are no flood control measures in any of the areas.
D) A long duration rainstorm falling on an area that consists of forest, grasslands, and no human development.
Q 19) What is the stage of a river?
B) Height of water that is flowing
Q 20) What two parameters are plotted in a hydrograph?
E) Discharge vs. time
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