Chapter 13: Questions and Answers

CHAPTER 13: QUESTIONS AND ANSWERS

1. Which statement about landslides is not true?

A. Most landslides have a trigger of some kind B. Landslides can occur underwater C. Human factors rarely contribute to landslides D. Landslides can involve anything from mud to large boulders and rock faces

2. What factor plays the largest role in a natural trigger for a landslide?

A. Wind B. Water C. Vibrations D. Magma activity

3. When inspecting a landslide, you want to know the furthest point it traveled.

What would you call this area?

A. Toe B. Transverse crack C. Tips D. Scarp

4. You see areas near a landslide caused by tension on the upper elevation area probably just prior to the landslide. What would you call these areas?

A. Radial cracks B. Crown cracks C. Transverse cracks D. Heads

5. What type of mass movement is considered slow movement but picks up momentum gradually over time?

A. Progressive creep B. Earth flow C. Lahar D. Debris flow

6. Which type of mass movement is most associated with fine sediment of varying types but without a great deal of moisture in it?

A. Progressive creep B. Debris avalanche C. Seasonal creep D. Earthflow

7. What don't you see as friction plays a strong role in a rapidly moving rock or debris flow?

A. The temperature of the material and ground heat up B. Minerals may recrystallize C. The shear stress increases D. Air can vaporize and create steam beneath the falling material

8. What statement is not true about landslide prediction?

A. Landslides are unpredictable events that cannot be predicted. B. Geographic information systems or GIS is used for predicting landslides. C. Previous landslide information provides the best data for predicting future events. D. Prediction uses a variety of inputs, such as geology, land use, and geomorphology.

9. In a slab-type avalanche, what is the sauchwall?

A. The top fracture of the falling slab B. It is the bottom fracture of the falling slab C. It is the overhanging lip of the slab before it falls D. It is the fracture along the side of the slab

10. In a wet snow avalanche, what is the main causative factor?

A. Warmer temperatures B. Recent snowfall C. Seismic activity D. Windy weather