Volcano Vocabulary

F3 7th grade

VolcanoVolcanoA weak spot in the crust where magma

has come to the surface

VolcanoVolcano

VolcanoVolcanoVolcanoes are what formed the Hawaiian

Islands.

MagmaMagmaThe molten mixture of

rock-forming substances, gases, and water from the mantle

MagmaMagma

Magma

MagmaMagmaMagma is found

inside the volcano.

LavaLavaLiquid magma that reaches the surface; also the rock formed

when liquid lava hardens

LavaLava

LavaLavaLava is found

outside the volcano.

ElementElementA substance that cannot be broken down into other

substances

ElementElement

ElementElementBasalt is made up of the elements silicon

and oxygen.

CompoundCompoundA substance in which

two or more elements are

chemically joined

CompoundCompound

CompoundCompoundSiO2 is the

compound formula for Silicon dioxide.

Cinder coneCinder coneA steep cone-shaped hill or

small mountain made of volcanic ash, cinders, and bombs piled up around a

volcano’s opening

Cinder coneCinder cone

Cinder coneCinder coneA cinder cone volcano

has a steep, cone-shaped hill or small

mountain.

Shield VolcanoShield VolcanoA wide, gently sloping

mountain made of layers of lava and formed by

quiet eruptions

Shield VolcanoShield Volcano

Shield VolcanoShield VolcanoShield volcanoes rose from a hot spot on the ocean floor to create the Hawaiian Islands.

Composite VolcanoComposite Volcano

A tall, cone-shaped mountain in which layers

of lava alternate with layers of ash and other

volcanic materials

Composite VolcanoComposite Volcano

Composite VolcanoComposite Volcano

Mount St. Helens in Washington State is

an example of a composite volcano.

PipePipeA long tube through which

magma moves from the magma chamber to

Earth’s surface

PipePipe

Pipe

PipePipeThe pipe connects the magma to the

vent.

VentVentThe opening through

which molten rock and gas leave a

volcano

VentVent

VentVentMost often the vent is at

the top of the volcano but sometimes there can be side vents.