This is the place along the pacific plate in which many volcanoes form.
What is the ring of fire
100
A vent or fissure in earth's surface
What is a volcano
100
These these volcanic chains form at divergent plate boundaries
What are mid ocean ridges
100
Forms thick brittle crust.the crust is torn into jagged prices as molten lava continues to flow underneath it
What is Aa
100
Columns of rock that rise through earth's mantle
What Are mantle plumes
200
Where 2 plates are being pulled away from each other
What is A divergent boundary
200
Molten rock in the upper-mantel and lower crust
What is magma
200
The Hawaiian island chain is this type of volcano
What are shield volcanoes
200
lava that forms a thick brittle crust and wrinkles as it is moved by molten lava that flows underneath it
What is Pahoehoe
200
Mt.Shasta is this type of volcano
What is composite cone
300
Where 2 plates come together
What is a convergent boundary
300
Fast moving mudflows created by volcanic ash and water produce this.
What are Lahars
300
This volcano, also called stratovolvano, has explosive eruptions, pryroclastic materials ejected from it, and broad bases that turn into steeper slopes as you approach the summit.
What is A composite cone
300
Formed underwater lava forms round lumps. You wouldn't want to rest your head on this though!
What is Pillow lava
300
Dark and rich lava that hardens into oceanic crust
What is basalt
400
At divergent boundaries, these underwater mountain chains are formed
What are mid ocean ridges
400
Lava that erupts out of a explosive volcanoes and is rich in silica and feldspars.
What is felsic
400
This type of volcano appeared in a farmers cornfield in Mexico in 1943 and grew quickly to be a 400m mountain!
What is a cinder cone
400
Large blobs of magma that harden in the air as they are ejected from a violent volcano
What are volcanic bombs
400
The top of a volcano
What is the summit crater
500
When a plate dives down under another plate it creates this zone
What is subduction
500
The dark rick lava rich in iron and magnesium, usually runny and not sticky, and produces non explosive volcanic eruptions
What is mafic lava
500
This is an opening on the side of a volcano where lava exits
What is vent
500
Pebble like bits of magma that harden before they hit the ground