Volcanoes

Volcano

An opening in the surface or crust of Earth which allows hot, molten rock, ash and gases to escape from deep below the surface.

Ring of Fire

It is the region where more than half of the active volcanoes of the world that atr above sea level are located or found.

• When plates collide

• When plates spread apart

• Volcanoes are formed in the middle of a plate

How volcanoes are formed?

Vent

Crater

Pipe

Cone

List the parts of a volcano

Strato Volcanoes

They are formed by alternating layers of lava and rock fragments

Shield Volcanoes

• They are among the biggest volcanoes

• They are made of many layers of runny lava flows

• Low-explosivity

Cinder Cone Volcanoes

• They are made of lava fragments called cinders

Active

If it has erupted recently or about 10,000 years ago

Inactive

• Also called dormant

• If it rarely has a record of previous eruption

Eruptive Pulse

• An explosion with eruption plume

• May last from a few seconds to minutes

Eruptive Phase

• Numerous eruptions that may alternate between plumr and lava surges

• May last from a few hours to days

Eruptive Episode

• It is composed of several phases that may lasy a few days, months, or years

Attracts tourists and visitors

Adds nutrients to the soil

Creation of new islands

Release of aerosols

Acid Rain

Abandoning of land and homes

What are the beneficial and harmful effects of volcanic eruptions?