WorksheetsVolcano Monitoring Quiz
Total questions: 10
Worksheet time: 5mins
What was the explosive force of the Mount St. Helens eruption equivalent to?
10 million tons of TNT
50 million tons of TNT
5 million tons of TNT
24 million tons of TNT
Who was the 30-year-old volcanologist from the US Geological Survey mentioned in the text?
Michael Brown
John Smith
David Johnston
Patricia Nado
What type of volcano is Mount St. Helens?
Lava dome
Cinder cone
Shield volcano
Stratovolcano
What is considered an active volcano?
Any volcano located near tectonic plate boundaries
Any volcano with a visible crater
Any volcano that has erupted in historical times
Any volcano with a height over 1,000 meters
What is a lahar?
A type of volcanic rock
A volcanic mudflow
A small volcanic eruption
A type of lava
What can indicate an impending volcanic eruption?
Decreased ground temperatures
Decreased ground deformation
Decreased sulfur dioxide emissions
Increased seismic activity
What is the primary threat from Mount Rainier?
Volcanic mudflow or lahar
Ash cloud
Lava flow
Cataclysmic eruption
What type of volcano is formed by runny lava?
Shield volcano
Cinder cone
Stratovolcano
Lava dome
How many active volcanoes are estimated to be on Earth currently?
500
2,500
1,500
3,500
What technology is used to measure ground deformation in volcanoes?
Seismographs
Barometers
GPS systems and satellite imagery
Thermal cameras
