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Volcanoes are created from a opening in the Earth's crust, which allows hot magma, ash and gases to escape. They form in the shape of cones, domes or simple fissures.

en.wikipedia.org/wiki/Volcano

A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava .... Some volcanoes have rugged peaks formed by lava domes rather than a summit crater while others have landscape features such as massive ...

owlcation.com/stem/How-Does-a-Volcano-Form

Nov 3, 2016 ... Volcanoes are most commonly formed at the convergence or divergence of tectonic plates. For example in Mid-Ocean Ridges, where tectonic ...

www.csun.edu/~jao45194/volcano2.html

When a large body of magma has formed, it rises thorugh the denser rock layers toward Earth's surface. Magma that has reached the surface is called lava.

www.weatherwizkids.com/weather-volcano.htm

Volcanoes are formed when magma from within the Earth's upper mantle works its way to the surface. At the surface, it erupts to form lava flows and ash deposits  ...

www.ask.com/youtube?q=How+Are+Volcanoes+Formed&v=6Z4as_imJfM
Jun 22, 2011 ... How Volcanoes Form .... Volcanoes, Their Formation, Impact, & Eruption - Interesting & Educational Videos for Kids, Children - Duration: 14:48.

www.onegeology.org/extra/kids/volcanoes.html

A volcano is formed when hot molten rock, ash and gases escape from an opening in the Earth's surface. The molten rock and ash solidify as they cool, forming ...

www.conserve-energy-future.com/howvolcanoesform.php

Shield volcanoes build up gradually for a long time, experiencing numerous eruptions and forming layers during the period. These kinds of volcanoes do not  ...

www.bbc.co.uk/schools/gcsebitesize/geography/natural_hazards/volcanoes_rev1.shtml

Key facts. A volcano is formed by eruptions of lava and ash. Volcanoes are usually cone shaped mountains or hills. When magma reaches the Earth's surface it ...

www.familyonbikes.org/educate/lessons/volcanoes.htm

Most volcanoes are formed by the movement of tectonic plates on the surface of the earth. These plates are basically huge pieces of rock that 'float' on the ...