Volcanic Hazards and Health Effects

The video tutorial covers various volcanic hazards, including lava, lahars, ash, and volcanic gases. It explains the characteristics, speed, and impact of each hazard, highlighting their destructive power and potential health risks. The tutorial also discusses the scale of these hazards, from local to global, and provides examples such as the 2010 Iceland eruption.

What is the primary reason lava causes more damage to infrastructure than to human life?

• Lava is extremely fast-moving.

• Lava is very slow-moving.

• Lava is highly explosive.

• Lava is invisible.

What is a lahar primarily composed of?

• Ash and gases

• Molten rock and ash

• Water and ash

• Lava and gases

How fast can lahars travel?

• 20 miles per hour

• 40 to 50 miles per hour

• 10 miles per hour

• 60 to 70 miles per hour

What global event in 2010 demonstrated the widespread impact of volcanic ash?

• Mount Vesuvius eruption

• Eyjafjallajökull eruption

• Krakatoa eruption

• Mount St. Helens eruption

What health issues can arise from inhaling volcanic ash?

• Skin rashes

• Respiratory diseases

• Digestive problems

• Hearing loss

Which volcanic hazard can reach a global scale?

• Lava

• Lahars

• Volcanic ash

• Volcanic gases

Which volcanic hazard is most likely to remain localized?

• Volcanic gases

• Lahars

• Lava

• Volcanic ash

What are the primary gases emitted by volcanoes?

• Carbon dioxide and sulfur dioxide

• Methane and ethane

• Oxygen and nitrogen

• Helium and neon

What is a common effect of volcanic gases on human health?

• Improved vision

• Respiratory irritation

• Enhanced hearing

• Increased energy

Why are volcanic gases typically localized in their impact?

• They are quickly neutralized by sunlight.

• They are absorbed by the ground.

• They cannot travel far from the volcano.

• They are heavier than air.