Living with Earth 1st Edition Classroom Response System Questions Chapter 7

07.01 Which of the following is NOT an example of how watershed infiltration and runoff can be influenced by people? The runoff water that is stored in ponds and dams could potentially infiltrate into the ground. Buildings and pavement can prevent infiltration. Removing vegetation could increase runoff. Increased boat traffic could increase runoff. All of the above answers are correct.

07.01 Which of the following is NOT an example of how watershed infiltration and runoff can be influenced by people? The runoff water that is stored in ponds and dams could potentially infiltrate into the ground. Buildings and pavement can prevent infiltration. Removing vegetation could increase runoff. Increased boat traffic could increase runoff. All of the above answers are correct. ANSWER: D, [p.192]

07.02 The longitudinal profile of a river describes a river’s gradient. What does a steep gradient generally say about that particular river’s characteristics? The steeper the gradient of the river, the faster the river will flow. The steeper the gradient of the river, the slower the river will flow. The steeper the gradient of the river, the less effectively the river can erode. The steeper the gradient of the river, the less sediment the river can carry.

07.02 The longitudinal profile of a river describes a river’s gradient. What does a steep gradient generally say about that particular river’s characteristics? The steeper the gradient of the river, the faster the river will flow. The steeper the gradient of the river, the slower the river will flow. The steeper the gradient of the river, the less effectively the river can erode. The steeper the gradient of the river, the less sediment the river can carry. ANSWER: A, [p. 195]

Which of the following statements about river sediment is correct? 07.03 Which of the following statements about river sediment is correct? Three terms that describe varying sizes of sediment carried along by a river are bedload, suspended load, and dissolved load. The Huang Ho River in China is one of the clearest rivers in the world because it contains such a small amount of suspended sediment. Turbulence discourages sediment suspension. As a river’s velocity increases it will usually begin to deposit sediment.

Which of the following statements about river sediment is correct? 07.03 Which of the following statements about river sediment is correct? Three terms that describe varying sizes of sediment carried along by a river are bedload, suspended load, and dissolved load. The Huang Ho River in China is one of the clearest rivers in the world because it contains such a small amount of suspended sediment. Turbulence discourages sediment suspension. As a river’s velocity increases it will usually begin to deposit sediment. ANSWER: A, [p. 197]

Floodplains form because __________. 07.04 Floodplains form because __________. human population tends to be denser along rivers so floodplains are a product of urbanization the type of vegetation that grows near a river keeps the land at a uniform level the periodic flooding of a river erodes the surrounding land and keeps it level humans have decided to create floodplains artificially to ensure croplands along the river remain fertilized by the suspended silt None of the above

Floodplains form because __________. 07.04 Floodplains form because __________. human population tends to be denser along rivers so floodplains are a product of urbanization the type of vegetation that grows near a river keeps the land at a uniform level the periodic flooding of a river erodes the surrounding land and keeps it level humans have decided to create floodplains artificially to ensure croplands along the river remain fertilized by the suspended silt None of the above ANSWER: C, [p. 200]

07.05 In an attempt to mitigate floods, humans build structures that try to ___________. increase discharge reduce bank height slow down the velocity of the river in response to increased sediment decrease the cross-sectional area of a channel increase the cross-sectional area of a channel

07.05 In an attempt to mitigate floods, humans build structures that try to ___________. increase discharge reduce bank height slow down the velocity of the river in response to increased sediment decrease the cross-sectional area of a channel increase the cross-sectional area of a channel ANSWER: E, [p. 213]