Volcanoes Quiz Flashcards
Is low viscosity thick or not thick?
Not thick
Are pahoehoe and block pyro or lava? Do they have high or thick viscosity?
Lava. High
Are Aa and pillow pyro or lava? Are they high or low viscosity.
Lava. Low
Are volcanic ash and lapili pyro or lava
Pyro
Are volcanic bombs and blocks pyro or lava?
Pyro
Is there more or less gas in non explosive magma?
Less
What do non explosive eruptions do.
Create a “calm” flow of magma that flows out of the earths surface.
What kind of volcanoes do nonexplosive eruptions create?
Shield
Composite(stratavolcanoes)
Is there more or less gas in explosive magma? What does that do.
More. More pressure. Water and silica go up
What do explosive eruptions create.
Pyroclastic Flows
What are pyroclastic flows? Is it more or less dangerous than non explosive eruptions.
Enormous amounts of hot ash, gases, dust from volcanoes. Much more dangerous
What kind of volcanoes do explosive eruptions make?
Cinder cone volcanoes(moderate explosion by volcanoes)
Composite
What is a bad thing that explosive eruptions make?
Can affect climate change and global tempeture(ash/gas block sun)
What is a god thing about explosive eruptions?
Ash creates fertile farm land
Where are there many active volcanoes?
Hawaii
What are volcanoes has had both non explosive and explosive eruptions
Mt. St. Helens
Magma forms when what goes down and what goes up?
Pressure goes down And tell goes up
How many clasifactions are there. What are they.
3
Extinct
Dormant
Active
What are hotspots? What is an example.
Hotspots are volcanically active places far from plate boundaries. Hawaii
Is a crater bigger or smaller than a cladera?
Smaller
What are two ways to predict eruptions. Explain them
Measure surface temp and gas emissions- by measuring the surface temp you may be able to tell if a volcanoes is about to erupt. The temp may change dramatically. You can also measure the gas emissions to find when a volcanoes will erupt. If the gas coming out of a volcanoes changes, it could be about to erupt.
Use a tiltameter to measure the volcanoes side- if you use a tiltmeter to measure the side of a volcano, you may be able to predict and volcanoes. If the side of the volcanoes suddenly swells, there may be magma coming up.
