1. List 3 physical requirements for an avalanche to occur.
a) unstable snow
b) trigger
c) snow cover
2. List 5 physical requirements for a slab avalanche to occur.
a) trigger
b) slab layer
c) weak layer/interface
d) weak layer/interface failure
e) fracture
3. Name 2 principal types of avalanches. Which is most destructive?
a) loose snow avalanche
b) slab avalanche
A slab avalanche is more destructive
4. List 2 categories of release.
a) natural
b) artificial
5. What causes most naturally triggered avalanches?
Rapid wind loading by new snowfall or wind deposition
6. How can hard-slab avalanches be distinguished from soft-slab avalanches?
Although both start similarly and leave a defined fractured line, hard slabs retain their shapes (large, angular blocks) while soft slabs often break into a mass of moving snow.
7. Which of the following is evidence of a slab avalanche?
a. A well-defined fracture line
b. A definite sliding layer
c. Large areas moving at once
d. All of the above
d.
8. The most probable time of occurance for sof snow avalanches is
a. During and after big winter storms
b. After a day or two of settlement
c. Following prolonged cold periods
d. In late winter following extensive faceting
a.
9. Most victims trigger the avalanche that buries them.
a. True
b. False
a.
10. List three parts of an avalanche path.
a. Starting zone
b. Track
c. Runout
