Living with Earth 1st Edition

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

2. Which of the following is NOT an example of how watershed infiltration and runoff can be influenced by people? 07.01 • 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.

3. Which of the following is NOT an example of how watershed infiltration and runoff can be influenced by people? 07.01 • 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]

4. The longitudinal profile of a river describes a river’s gradient. What does a steep gradient generally say about that particular river’s characteristics? 07.02 • 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.

5. The longitudinal profile of a river describes a river’s gradient. What does a steep gradient generally say about that particular river’s characteristics? 07.02 • 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]

6. Which of the following statements about river sediment is correct? 07.03 • 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.

7. Which of the following statements about river sediment is correct? 07.03 • Three terms that describe varying sizes of sediment carried along by a river are bedload, suspendedload, 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]

8. Floodplains form because __________. 07.04 • 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

9. Floodplains form because __________. 07.04 • 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]

10. In an attempt to mitigate floods, humans build structures that try to ___________. 07.05 • 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

11. In an attempt to mitigate floods, humans build structures that try to ___________. 07.05 • 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]