Mount St Helens: Back from the Dead Quiz

What was the magnitude of the earthquake that triggered the 1980 eruption of Mount St Helens?

• 4.5

• 5.1

• 6.0

• 7.2

Tags

NGSS.MS-ESS3-2

What is the term used to describe the cloud of searing gas and rock that raced over the countryside during the 1980 eruption?

• Ash cloud

• Volcanic storm

• Lava flow

• Pyroclastic flow

Which small burrowing animal was one of the first signs of life to return to Mount St Helens after the eruption?

• Mole

• Prairie dog

• Field mouse

• Northern pocket gopher

What plant species was discovered flourishing on the Pumice Plain, indicating the return of life?

• Alpine daisy

• Dandelion

• Prairie lupin

• Mountain fern

What did the scientists use to monitor the activity inside Mount St Helens?

• Anemometers

• Barometers

• Seismometers

• Thermometers

What unique seismic pattern was observed during the 2004 reawakening of Mount St Helens?

• Earthquake swarms

• Volcanic quakes

• Drumbeats

• Harmonic tremors

What was the height of the spine of lava that emerged during the 2004 eruption?

• 400 meters

• 300 meters

• 200 meters

• 100 meters

What did the analysis of lava samples from different eruptions reveal about the magma?

• Its viscosity

• Its color

• Its gas content

• Its temperature

How long can Mount St Helens pause between major explosive eruptions?

• 2000 years

• 1000 years

• 500 years

• 100 years

Tags

NGSS.MS-ESS3-2

What is the main challenge scientists face in predicting future eruptions of Mount St Helens?

• Tracking the lava flow

• Monitoring the ash cloud

• Determining the gas budget

• Measuring the temperature

Tags

NGSS.MS-ESS3-2