I WONDER - What Triggers An Avalanche?

Avalanches can be caused by natural factors like snowfall, wind, and temperature changes, as well as human activities such as skiing and snowmobiling. Vibrations from loud noises can also trigger avalanches. To mitigate risks, controlled avalanches are sometimes set off by ski resorts or transportation authorities using explosives, ensuring safety and maintaining access to roads and ski runs.

Which natural factor is NOT mentioned as a cause of avalanches?

• Rainfall

• Wind

• Snowfall

• Temperature changes

What human activity is mentioned as a potential trigger for avalanches?

• Skiing

• Hiking

• Camping

• Fishing

Which of the following can cause vibrations that may lead to an avalanche?

• A snowmobile engine

• A gentle breeze

• A whisper

• A flashlight

Why do ski resorts sometimes intentionally set off avalanches?

• To clear snow from roads

• To entertain tourists

• To reduce the risk of unexpected avalanches

• To create new ski runs

What method is used by authorities to trigger controlled avalanches?

• Snowplows

• Water cannons

• Explosives

• Loudspeakers