Review about Volcanic Hazards

Which of the following is NOT considered a factor that influences vulnerability to disasters?

• Socioeconomic status

• Health

• Governance

• Population density

An active volcano is generally considered to have erupted within the last how many years?

• 100

• 1,000

• 10,000

• 100,000

What is a characteristic of an extinct volcano?

• It erupts regularly.

• It has not erupted in recent history but could erupt again.

• It erupted thousands of years ago and is believed to be unlikely to erupt again.

• It shows signs of unrest like frequent earthquakes.

A volcano that has not erupted in recent history but is expected to erupt again in the future is classified as:

• Active

• Dormant

• Extinct

• Inactive

Which of the following best defines "vulnerability" in the context of disaster risk?

• The location of people and property in hazard-prone areas.

• The intensity of a natural hazard event.

• The capacity to cope and recover from a disaster.

• The characteristics of people and communities that increase their susceptibility to the damaging effects of a hazard.

Which of the following is an example of a pyroclastic flow hazard?

• Slow-moving streams of molten rock.

• Showers of airborne volcanic particles.

• A turbulent mass of ejected volcanic materials and hot gas flowing at high speed.

• A thick mixture of volcanic sediment and water.

Which of the following is NOT a potential consequence of ashfall?

• Reduced visibility.

• Collapse of building roofs.

• Disruption of air travel.

• Increased agricultural productivity.

Why are lahars considered a significant hazard?

• They are slow-moving and give people time to evacuate.

• They are composed of hot, fast-moving gas and ash.

• They can destroy infrastructure and cause flooding.  

• • They only affect areas very close to the volcano's vent.

Which of the following statements BEST describes the reliability of volcano classification?

• Volcano classification is foolproof and can accurately predict future eruptions.

• Extinct volcanoes will never erupt again.

• Volcano classification is not foolproof, as eruptions can occur from volcanoes thought to be extinct.  

• • Dormant volcanoes pose no threat of eruption.

Which of the following is a key factor influencing the risk associated with volcanic hazards?

• The color of the volcano.

• The age of the volcano.

• Proximity to the volcanic event.

• • The type of rock the volcano is made of.