How a volcano eruptsHow a volcano erupts

‘‘A’ student workA’ student workAnnamarie MoraytisAnnamarie Moraytis

Volcanoes areVolcanoes are““Pressure valves that releases energy from deep within the Pressure valves that releases energy from deep within the

Earth. Beautiful and powerful, awe-inspiring and deadly, they Earth. Beautiful and powerful, awe-inspiring and deadly, they are spectacular reminders of the dynamic forces that are spectacular reminders of the dynamic forces that

continually shape our planet.”continually shape our planet.”

DiscoveryKids websiteDiscoveryKids website

Plate tectonicsPlate tectonics

• GlideGlide

• Different speeds and Different speeds and directionsdirections

• Rub, collide, slipRub, collide, slip

• Create Create mountain/volcanomountain/volcano

Volcanic eruptionVolcanic eruption

•Deep in the Deep in the Earth it is so Earth it is so hot some hot some rocks slowly rocks slowly melt melt

Volcanic eruptionVolcanic eruption

•Become a Become a thick flowing thick flowing substance substance called called magma.magma.

Volcanic EruptionVolcanic Eruption

• Magma is Magma is lighter than lighter than the solid rock the solid rock around it, around it, and rises and and rises and collects in collects in magma magma chambers. chambers.

Volcanic EruptionVolcanic Eruption

•Magma pushes Magma pushes through vents through vents and fissures in and fissures in the Earth's the Earth's surface.surface.

• Photo is a Photo is a vent on vent on Earth’s surfaceEarth’s surface

Volcanic Volcanic EruptionEruption

A volcanic A volcanic eruption occurs! eruption occurs! Magma that has Magma that has

erupted is erupted is called lava.called lava.

A volcanic A volcanic eruption occurs! eruption occurs! Magma that has Magma that has

erupted is erupted is called lava.called lava.

Volcanic eruptions can Volcanic eruptions can bebe

ExplosiveExplosive Not ExplosiveNot Explosive

Some volcanoes cause Some volcanoes cause global effectsglobal effects

Mt. St. Helen’s, Mt. St. Helen’s, Washington State USA Washington State USA

19801980

Mt. Pinatubo, Mt. Pinatubo, Philippines 1991Philippines 1991