MAGMA RISES UP through cracks or weakenesses in earth's crust
Pressure builds up inside the earth
Pressure released magma explodes to surface causing volanic eruption.
Lava from the eruption cools to form new crust.
Over time after several eruptions rock builds up and a volcano forms.
Magma chamber = collection of magma
Main vent = main places for magma to escape
Secondary vent = smaller places through magma escapes
Crater = created after an eruption, blows top off volcano