1.when two plates slide or separate magma can rise up and fill the space that opens ( an eruption can happen due to pressure )
2.when magma wells up from the chamber it cools and turns to lava
3.after many eruptions layers of lava and ash build up around the vent a cone shaped mountain is formed with a crater at the top were the lava comes through
active volcano
a volcano that has erupted in the past 10,000 years
dormant volcano
a volcano that had not erupted in 10,000 years but is expected to erupt again in the future
