What is a volcano?
a mountain or hill which usually has a crater or depression at the summit.
What is a volcano?
large underground pool of molten rock sitting underneath the Earth’s crust.
What is a magma chamber?
The shape and size of a composite volcano
What is symmetrical and large?
Small volcano with steep angled sides
Cinder cone
What is the general shape and size of a shield volcano?
Flat and very large in area
Volcanoes form around this in the Earth's crust.
What is a vent?
the weak point in the Earth’s crust where hot magma rises from the magma chamber and reaches the surface.
What is the main vent?
How are composite volcanoes built?
Alternating layers of ash, lava and cinder over time.
Made by thick lava that can't move a very long distance
lava dome volcano
Are Shield Volcanoes explosive?
No
Volcanoes do this either continuously or at irregular intervals?
What is erupt?
a separate vent through which magma can reach the surface in other areas
What is secondary vent?
What type of eruptions do Composite volcanoes have?
Violent, explosive eruptions
How long does it take cinder cone volcanoes to form? A short or long period of time?
A short period of time
True or False: Shield volcanoes create pyroclastic flow
false
Name 3 things that are expelled from a volcanic vent
lava, ash, steam, volcanic bombs
Large projectiles thrown into the air by eruptions
volcanic bombs
What type of flow do composite volcanoes cause?
Pyroclastic Flow
In this kind of volcano, blobs of lava spew into the air during eruptions and fall as cinders on the sides of the volcano.
True or false, Shield Volcanoes are among the largest in the world.
True
How many types of volcanoes are there?
Four
fast-moving current of hot gas and rock that moves away from a volcano
What is pyroclastic flow?
Give at least one example of a composite volcano in real life?
Mt. Fuji, Mt. Saint Helens, Mt. Ranier, Mt. Hood
Give one example of a lava dome volcano
Mt. Pelee, Mt. Lassen
Give one example of a shield volcano
Hawaii, Galapagos islands