The Mountain Environment

by Mandy Barrow

This site uses cookies. See our Cookie Policy for information  
Facts about Volcanoes for Kids

title imageWhat is a Volcano?

A volcano is a landform (usually a mountain) where molten rock erupts through the surface of the planet.

In simple terms a volcano is a mountain that opens downward to a pool of molten rock (magma) below the surface of the earth. It is a hole in the Earth from which molten rock and gas erupt.

Did you know?

The name "volcano" has its origin from the name of Vulcan, a god of fire in Roman mythology.

As pressure in the molten rock builds up it needs to escape somewhere. So it forces its way up “fissures” which are narrow cracks in the earths crust. Once the magma erupts through the earth’s surface it’s called lava.


volcano What is the difference between lava and Magma?

Magma is liquid rock inside a volcano.

Lava is liquid rock (magma) that flows out of a volcano. Fresh lava ranges from 1,300° to 2,200° F (700° to 1,200° C) in temperature and glows red hot to white hot as it flows.

volcano How many volcanoes are there in the world?

There are around 1,510 active volcanoes in the world.

We currently know of 80 or more which are under the oceans.

volcanoWhat are the three layers the Earth is made of?

    1. Crust
      The crust is the outer layer of Earth. It is about 18 miles thick. It is the part we live on.
    2. Mantle
      The second layer is called the mantle. It is about 1,800 miles thick.
    3. Core
      The inner layer is called the core.

volcano What causes volcanoes to erupt?

The Earth's crust is made up of huge slabs called plates, which fit together like a jigsaw puzzle. These plates sometimes move.

Between the Earth's crust and the mantle is a substance called magma which is made of rock and gases.

When two plates collide, one section slides on top of the other, the one beneath is pushed down.  Magma is squeezed up between two plates.

Did you know?

Volcanoes are like giant safety valves that release the pressure that builds up inside the Earth.

volcano When magma erupts, what is it called?

When magma erupts through the earth's surface it is called lava

volcanoWhat is the Ring of Fire?

Over half of the world’s volcanoes arise in a belt around the Pacific Ocean called the Ring of Fire.

parts of a volcano
Volcano Eruptions

Largest active volcano

volcano Websites

Volcanoes around the World
Each triangle on the map represents a volcano.

Volcano FAQ's -- Learn About Volcanoes
What is a volcano? ... Why do volcanoes erupt? ... Where do volcanoes erupt? ... How hot is a volcano?

Information on Volcanoes including volcanoes and climate

back to the top
email© Copyright - please read
All the materials on these pages are free for homework and classroom use only. You may not redistribute, sell or place the content of this page on any other website or blog without written permission from the author Mandy Barrow.

©Copyright Mandy Barrow 2013

Follow me on Twitter @mbarrow

t TN10 4BB UK