Question 1

An avalanche danger level of extreme will be indicated by the colour symbol

Accepted Answer

A)  orange. 
B)  red. 
C)  yellow. 
D)  red with black border. 
E)  orange with black border. 
A)  orange. 
B)  red. 
C)  yellow. 
D)  red with black border. 
E)  orange with black border.

Question 2

Slopes less that 25 degrees only produce wet slides.

Accepted Answer

A) True 
 B)False

Question 3

Explain why there are geographical differences in avalanche occurrence across Canada.

Accepted Answer

Occurrence is determined by slope and am

Question 4

The mountains in Chile and Argentina are not at high risk of avalanches because

Accepted Answer

A)  they are in a warm, equatorial region. 
B)  they lie east of the Atacama desert and receive little snowfall. 
C)  they lie west of the Atacama desert and receive little snowfall. 
D)  they are near the Pacific Ocean. 
E)  they are too steep. 
A)  they are in a warm, equatorial region. 
B)  they lie east of the Atacama desert and receive little snowfall. 
C)  they lie west of the Atacama desert and receive little snowfall. 
D)  they are near the Pacific Ocean. 
E)  they are too steep.

Question 5

The most important terrain factor for avalanche formation is slope steepness.

Accepted Answer

A) True 
 B)False

Question 6

Explosions in the start zone of an avalanche path

Accepted Answer

A)  always release avalanches. 
B)  usually release avalanches. 
C)  always produce slab avalanches. 
D)  guarantee that the snowpack will not fail naturally. 
E)  guarantee that the snowpack will not be triggered by a person afterward. 
A)  always release avalanches. 
B)  usually release avalanches. 
C)  always produce slab avalanches. 
D)  guarantee that the snowpack will not fail naturally. 
E)  guarantee that the snowpack will not be triggered by a person afterward.

Question 7

Why are avalanches less frequent on rough surfaces such as talus slopes?

Accepted Answer

Because more snow must accumul

Question 8

Avalanche risk can be estimated by determining the

Accepted Answer

A)  speed, thickness and size of avalanches. 
B)  distribution, frequency and size of avalanches. 
C)  speed, thickness and duration of avalanches. 
D)  the size of the avalanche path. 
E)  the thickness of the snow. 
A)  speed, thickness and size of avalanches. 
B)  distribution, frequency and size of avalanches. 
C)  speed, thickness and duration of avalanches. 
D)  the size of the avalanche path. 
E)  the thickness of the snow.

Question 9

Point-release snow avalanches commonly occur after heavy snowfall because the snow crystals have little time to bond.

Accepted Answer

A) True 
 B)False

Question 10

During which season are snow avalanches the least common?

Accepted Answer

A)  early spring 
B)  late spring 
C)  summer 
D)  fall 
E)  winter 
A)  early spring 
B)  late spring 
C)  summer 
D)  fall 
E)  winter

Question 11

How does hoar form?

Accepted Answer

A)  when the temperature hovers around the freezing point, snow that melts during the day refreezes at night 
B)  when the air is dry and cold, ice crystals grow on the surface of the snowpack 
C)  feather-shaped snowflakes bond together when they hit the surface of the snowpack 
D)  wind carries away unconsolidated snow, leaving behind small grooves and needle shaped ice crystals 
E)  when the air is wet and cold, water vapour transforms directly into ice 
A)  when the temperature hovers around the freezing point, snow that melts during the day refreezes at night 
B)  when the air is dry and cold, ice crystals grow on the surface of the snowpack 
C)  feather-shaped snowflakes bond together when they hit the surface of the snowpack 
D)  wind carries away unconsolidated snow, leaving behind small grooves and needle shaped ice crystals 
E)  when the air is wet and cold, water vapour transforms directly into ice

Question 12

Although sluffs move only small amounts of snow,how are they potentially dangerous?

Accepted Answer

Sluffs can cause cli

Question 13

Compacted snow is more likely to move than light powdery snow.

Accepted Answer

A) True 
 B)False

Question 14

As long as you have a transceiver,it is better to travel through the backcountry alone so there is less chance of triggering an avalanche.

Accepted Answer

A) True 
 B)False

Question 15

Point release avalanches

Accepted Answer

A)  produce a distinct downslope-narrowing trough. 
B)  have a near vertical crown. 
C)  have lateral scarps. 
D)  produce a distinct downslope-widening trough. 
E)  occur when a slab of snow slips along weak layer. 
A)  produce a distinct downslope-narrowing trough. 
B)  have a near vertical crown. 
C)  have lateral scarps. 
D)  produce a distinct downslope-widening trough. 
E)  occur when a slab of snow slips along weak layer.

Question 16

In most recreational accidents wind triggers the avalanche.

Accepted Answer

A) True 
 B)False

Question 17

What are the four most important factors determining how much snow will be in a particular place?

Accepted Answer

slope,elev

Question 18

What is a wind slab?

Accepted Answer

A body of thick,poor

Question 19

Before modern recreation,the greatest loss of life due to avalanches was due to the

Accepted Answer

A)  gold rush. 
B)  building of towns in avalanche prone regions. 
C)  building of the Canadian Pacific Railway. 
D)  lack of trained rescue dogs. 
E)  inability to properly forecast. 
A)  gold rush. 
B)  building of towns in avalanche prone regions. 
C)  building of the Canadian Pacific Railway. 
D)  lack of trained rescue dogs. 
E)  inability to properly forecast.

Question 20

Slab avalanches

Accepted Answer

A)  produce a distinct downslope-narrowing trough. 
B)  have a near vertical crown. 
C)  produce a distinct downslope-widening trough. 
D)  results from the initial failure of a small amount of snow. 
E)  commonly happen after a heavy snowfall. 
A)  produce a distinct downslope-narrowing trough. 
B)  have a near vertical crown. 
C)  produce a distinct downslope-widening trough. 
D)  results from the initial failure of a small amount of snow. 
E)  commonly happen after a heavy snowfall.

An avalanche danger level of extreme will be indicated by the colour symbol

Slopes less that 25 degrees only produce wet slides.

Explain why there are geographical differences in avalanche occurrence across Canada.

The mountains in Chile and Argentina are not at high risk of avalanches because

The most important terrain factor for avalanche formation is slope steepness.

Explosions in the start zone of an avalanche path

Why are avalanches less frequent on rough surfaces such as talus slopes?

Avalanche risk can be estimated by determining the

Point-release snow avalanches commonly occur after heavy snowfall because the snow crystals have little time to bond.

During which season are snow avalanches the least common?

How does hoar form?

Although sluffs move only small amounts of snow,how are they potentially dangerous?

Compacted snow is more likely to move than light powdery snow.

As long as you have a transceiver,it is better to travel through the backcountry alone so there is less chance of triggering an avalanche.

Point release avalanches

In most recreational accidents wind triggers the avalanche.

What are the four most important factors determining how much snow will be in a particular place?

What is a wind slab?

Before modern recreation,the greatest loss of life due to avalanches was due to the

Slab avalanches

Introduction to Natural Hazards

Internal Structure of Earth and Plate Tectonics

Earthquakes

Tsunamis

Volcanoes and Volcanic Eruptions

Landslides

Subsidence and Soil Expansion and Contraction

River Flooding

Atmosphere and Severe Weather

Hurricanes and Extratropical Cyclones

Waves, Currents, and Coastlines

Wildfires

Climate Change

Meteorite Impacts and Extinctions

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Exam 7: Snow Avalanches

An avalanche danger level of extreme will be indicated by the colour symbol

Slopes less that 25 degrees only produce wet slides.

Explain why there are geographical differences in avalanche occurrence across Canada.

The mountains in Chile and Argentina are not at high risk of avalanches because

The most important terrain factor for avalanche formation is slope steepness.

Explosions in the start zone of an avalanche path

Why are avalanches less frequent on rough surfaces such as talus slopes?

Avalanche risk can be estimated by determining the

Point-release snow avalanches commonly occur after heavy snowfall because the snow crystals have little time to bond.

During which season are snow avalanches the least common?

How does hoar form?

Although sluffs move only small amounts of snow,how are they potentially dangerous?

Compacted snow is more likely to move than light powdery snow.

As long as you have a transceiver,it is better to travel through the backcountry alone so there is less chance of triggering an avalanche.

Point release avalanches

In most recreational accidents wind triggers the avalanche.

What are the four most important factors determining how much snow will be in a particular place?

What is a wind slab?

Before modern recreation,the greatest loss of life due to avalanches was due to the

Slab avalanches

Introduction to Natural Hazards

Internal Structure of Earth and Plate Tectonics

Earthquakes

Tsunamis

Volcanoes and Volcanic Eruptions

Landslides

Subsidence and Soil Expansion and Contraction

River Flooding

Atmosphere and Severe Weather

Hurricanes and Extratropical Cyclones

Waves, Currents, and Coastlines

Wildfires

Climate Change

Meteorite Impacts and Extinctions

Filters