Volcanic Ash and Eruption Concepts

Liz Cottrell, a curator at the National Museum of Natural History, explains the nature of volcanic ash, distinguishing it from smoke. Volcanic ash is a mix of ground-up rock and glass, posing hazards to both people and aircraft. The video explores volcanic ash samples from Mount Saint Helens and explains how volcanic ash forms during eruptions, including the concept of frozen hot magma. The video concludes with a reminder of the key points about volcanic ash.

Who is Liz Cottrell?

• A geologist at the National Museum of Natural History

• A scientist studying earthquakes

• A volcanologist at the Smithsonian

• A curator and director of the Global Volcanism Program

What is volcanic ash primarily composed of?

• Water vapor and smoke

• Burnt wood residue

• Carbon and organic material

• Ground-up rock and glass

How does volcanic ash differ from the ash in a fireplace?

• Fireplace ash is carbon-based

• Volcanic ash is organic

• Fireplace ash is made of glass

• Volcanic ash is a residue of burning wood

What danger does volcanic ash pose to airplanes?

• It can cause the plane to overheat

• It can make the plane heavier

• It can damage engines by being sucked into them

• It can cause turbulence

What is the significance of the 'Blast Ash' can in the museum?

• It is a replica of volcanic ash

• It is used to demonstrate smoke

• It is a sample from Mount Saint Helens

• It contains ash from a recent eruption

What happens to magma during a volcanic eruption?

• It cools quickly and solidifies

• It evaporates

• It turns into smoke

• It remains liquid

What is 'frozen hot magma'?

• Magma that remains hot and liquid

• Magma that turns into smoke

• Magma that turns into volcanic ash

• Magma that evaporates

How small can volcanic ash particles be?

• As small as a human hair

• As small as a water droplet

• As small as a dust particle

• As small as a grain of sand

What drives the eruption of a volcano?

• The solidification of magma

• The trapped gases in magma

• The evaporation of water

• The cooling of magma

What is a major hazard from volcanoes?

• Tsunamis

• Earthquakes

• Volcanic ash

• Lava flows