tephra
any type or size of rocks ejected from the volcano and travels an airborne path ( including ash and volcanic bombs )
effusive
gentle eruption that is mainly dominated by the outpouring of lava onto the ground
conduit
central passageway in the volcano that magma travels. It connects the magma chamber to the vent
viscous
thick , sticky consistency
main vent ( active vent )
opening in the earth’s surface in which gases and volcanic materials escape
secondary vent / cone
main vent may be blocked so magma have to find a new route to the surface , forming the secondary cone and vent
lava
molten rocks ( magma ) that is ejected onto the surface