Avalanches

Which cause creates the majority of avalanches globally?

• People

• Heavy rain

What causes avalanches? (select 2)

• 
• 
• 

Tags

NGSS.MS-ESS3-2

What's the most basic underlying cause of avalanches?

• Skiers and snowboarders

• Stress acting quickly on snow

• Snow piling on extremely steep terrain

• Global climate change

How can triggering explosives help prevent avalanches?

• By completely leveling the slopes of mountains

• By melting all the snow on mountainslides

• By preventing huge snowpacks from forming

• By destroying trees and rocks that can hurt people in avalanches

Tags

NGSS.MS-ESS3-2

How are avalanches different from landslides?

• Avalanches involve snow, landslides usually don't

• Avalanches happen on slopes, landslides happen on flat terrain

• Avalanches are usually caused by changes in precipitation; landslides are usually caused by changes in temperature

• Avalanches always have natural causes; landslides are usually caused by human activity

What is the force that pulls slabs of snow downward?

• Friction

• Drag

• Atmospheric pressure

• Gravity

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

NGSS.MS-PS2-5

Which slope has the highest risk of avalanche?

• A 15-degree slope

• A 45- degree slope

• A 65- degree slope

• An 85-degree slope

Which of the following is an opinion about avalanches?

• Ice, rocks, and debris can get mixed into avalanches

• Many ski resorts take anti-avalanche precautions

• Avalanches are scarier than earthquakes

• Avalanches are distinct from mudslides

causes of avalanche formation can be: (4 answers)

• Slope inclination and direction

• Snowpack conditions

• wind and temperature

• dense snow layers

• Ground surface conditions

Which is NOT correct?

• An avalanche is a rapid flow of snow down a slope

• the trigger of an avalanche is only natural and causes the sudden rupture of the snow pack

• All avalanches have a trigger, a starting point, a slide path and run out zone.

• The debris deposit is the accumulated mass of the snow avalanche once it has come to rest and may contain ice, soil, rocks and vegetation