Volcano- vent in the earth’s crust from which lava, steam and ashes
Tectonic Plates- a massive, irregularly shaped slab of solid rock, generally composed of both continental and oceanic lithosphere.
Divergent plate boundary- Where 2 plates are moving away from each other.
Convergent plate boundary- A tectonic boundary where two plates are moving toward each other.
Magma- molten material beneath or within the earth's crust, from which igneous rock is formed
Volcanic Ash- finely pulverized lava thrown out by a volcano in eruption.
Mantle- The portion of the earth between the crust and the core.
Core- The central portion of the earth.
Crust- The outer layer of the earth.
Dormant- Inactive
Extinct- no longer in existence; ended or died out
Lava- the molten, fluid rock that issues from a volcano or volcanic vent