Quiz 4 GLG 121 - Course Work PDF

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Question 1 1/ 1 pts Soil creep You Answered cannot be recognized or detected because it is such a slow process. is more of a hazard to property than to lives.

All of the choices are correct. commonly triggers snow avalanches because it makes overlying snow unstable.

Question 2 1 / 1 pts The angle of repose refers to the following condition: Correct! Resistance force = driving force.

None of these choices

Resistance force > driving force.

Resistance force < driving force.

Question 3 1 / 1 pts Vegetation tends to increase slope stability by holding rainwater on the surface. Correct! holding soil in place with roots.

adding water to the soil.

removing weight from the slope.

Question 4 1 / 1 pts The steepest stable slope that an unconsolidated material can maintain is the material's cohesion. shear strength.

scarp. Correct! angle of repose.

Question 5 1 / 1 pts Meanders migrate or shift their location by All of the choices are correct.

lateral erosion on the inside of meander bends.

downcutting erosion. Correct! sediment deposition on the inside of meander bends and erosion on the outside.

Question 6 1 / 1 pts The principal source of evaporated water that becomes precipitation are

Correct! the oceans. glacier ice.

streams.

volcanic eruptions.

Question 7 1 / 1 pts On a stream hydrograph, the time between a period of heavy rainfall and an upstream flood is unpredictable. Correct! short.

long.

cannot be determined from the hydrograph.

Question 8 1 / 1 pts The steepness or slope of a stream channel in the direction of flow is the channel's capacity. base level. Correct! gradient.

bed load.

Question 9 1 / 1 pts If the width of the stream is 20 feet, the depth 5 feet, and velocity 10 feet per second, then the discharge is 1000 square feet/second. 1000 feet/second.

None of the answers are correct. Correct! 1000 cubic feet per second.

Question 10 1 / 1 pts Which statement is true about a 100-year flood? If it happened this year, there’s no way it could happen again next year.

It has a probability of occurrence of 100%. Correct! A flood that big has a 1% chance of happening next year.

It always happens once in a century....