According to the text, what is responsible for starting the vast majority of avalanches?, human activities, breaking glaciers, earthquakes, heavy snowfall, Which term describes the path an avalanche follows as it moves down a mountain?, weak layer, runout zone, track, starting zone, What is the most dangerous type of avalanche, characterized by a large section of snow breaking off and moving at high speeds?, a snowpit collapse, a slab avalanche, a glacier break, a light snowslide, What is the typical range of steepness for slopes where avalanches usually begin?, 60-80 degrees, 30-50 degrees, 10-50 degrees, Only on flat ground, What is the primary purpose of digging a 'snow pit'?, To create a shelter from a snowstorm., To study the different layers of snow and identify weak spots., To measure the total depth of the snow., To find the location of the starting zone for a future avalanche., Which of the following is NOT one of the three main things that cause avalanches to happen?, Air temperature, Weather, Snowpack, Terrain, What kind of snow crystals in a layer indicate that the snow is weak and can break easily?, Small, densely packed crystals, Icy frozen crystals, Wet, heavy snow crystals, Big, loose snow crystals.

Avalanches explained

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