Volcano Terminology Worksheet with labeled diagram of volcanic features.

- Magma chamber: The large, underground reservoir of molten rock at the bottom of the diagram.
- Conduit: The central, vertical pipe that carries magma from the magma chamber to the surface.
- Vent: The opening at the top of the volcano where material is erupted; this is the same as the crater in this diagram.
- Edifice: The main body or structure of the volcano itself, formed by layers of lava and ash.
- Crater: The bowl-shaped depression at the summit of the volcano, which is also the vent.
- Flank Eruption: An eruption occurring on the side (flank) of the volcano, not from the main summit vent.
- Ash: The fine particles ejected into the air, forming the cloud above the volcano.
- Gas: Volatile substances released during an eruption, part of the eruption column.
- Eruption Column: The tall plume of ash, gas, and other volcanic material rising from the vent.
- Crust: The solid outer layer of the Earth, shown as the horizontal line beneath the volcano.
- Lava: Molten rock that has erupted onto the surface, shown flowing down the sides of the volcano.