weak spot in the crust where molten material, comes to the surface.
molten mixture of rock-forming substances, gases, and water from the mantle.
when magma reaches the surface.
occur where ever there are plate boundaries.
forms when magma forces itself across rock layers and hardens.
forms when magma squeezes between layers of rock and hardens.
opening were the magma leaves the volcano towards the surface.
material found in magma that is made of oxygen and silicon.
volcano is not active, but may become active in the future.
that is erupting or shows signs of erupting in the future.
unlikely erupt ever again.
is a fountain of water and steam that erupts from the ground.
is formed when plate movements cause the crust to warp downward, forming a large bowl-shaped valley.
huge hole left by collapse of a volcanic mountain.
long tube that connects the magma chamber to Earth's surface.
layers of harden lava that gradually build a wide, gently sloping mountain.
materials that have exploded from the volcano began to pile up around the vent, forming a steep, cone-shaped hill or mountain.
materials that have exploded from the volcano start alternating to form tall, cone-shaped mountain.
forms when magma hardens in a volcano's pipe
large body of cooling magma found inside the crust, that becomes into a massive rock.