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Volcano

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 ... Erupting volcanoes can pose many hazards, not only in the immediate vicinity of the eruption. ...

What causes a volcano erupt?

www.vtaide.com/png/George/volcanoes.htm

A volcano begins as melted rock (magma) which rises from deep inside the earth toward the surface. As the gas-filled magma rises ...

Why are there volcanoes? Why do they erupt? | Volcano World ...

volcano.oregonstate.edu/why-are-there-volcanoes

Volcanoes erupt because of density and pressure. The lower density of the magma relative to the surrounding rocks causes it to rise (like air bubbles in syrup).

What Causes A Volcanic Eruption? | IFLScience

www.iflscience.com/environment/are-explosive-volcanic-eruptions-triggered-frictional-heating/

Jan 6, 2016 ... A team of volcanologists led by the University of Liverpool have released a perhaps controversial Nature study on the causes of volcanic ...

Why do volcanoes erupt? | Reference.com

www.reference.com/science/volcanoes-erupt-6ec5e7566259e2a5

How do cinder-cone volcanoes erupt? ... The Earth has to relieve the pressure in the form of a volcanic eruption. After the ... What causes a volcano to form?

Just Ask: What Makes Volcanoes Erupt? | PBS NewsHour

www.pbs.org/newshour/rundown/why-does-the-earth-have-volcanoes-and-what-makes-them-erupt/

Nov 30, 2010 ... It's time for our weekly Just Ask feature, where the experts tackle your questions on science and technology. John Eichelberger, a volcano ...

What causes Volcanoes? - Geoscience Australia

www.ga.gov.au/scientific-topics/hazards/volcano/basics/causes

Where plates move away from each other at spreading or divergent plate margins, volcanic eruptions are gentle extrusions of basaltic lava. Most of these occur ...

How Do Volcanoes Erupt? - Universe Today

www.universetoday.com/31124/how-volcanoes-erupt/

May 26, 2016 ... Volcanic eruptions are driven by a combination of mechanisms, ... What is it exactly that makes molten rock rise from the Earth's interior and ...

www.ask.com/youtube?q=What Makes Volcanoes Erupt&v=-kQwudeT3ww
Jun 29, 2013 ... A quick and fun cartoon lesson about volcanoes. Great for teachers and ... What Causes a Volcano to Erupt? (Part 2 of 6) - Duration: 7:08.
www.ask.com/youtube?q=What Makes Volcanoes Erupt&v=ShOFQ2h2fws
Jun 19, 2014 ... Volcanoes form when magma from the earth's interior is able to make its way to the surface, via a vent. This is usually associated with plate ...
Answer
Several factors trigger volcanic eruptions, including the buoyancy of magma, a build-up of pressure from the gases in the magma and an injection of new magma into a full magma chamber.
When a part of the earth's upper mantle or lower crust melts, magma forms. A volcano is essentially an opening or a vent through which this magma and the dissolved gases it contains are discharged.
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What causes a volcano to erupt and how do scientists predict ...

www.scientificamerican.com

When a part of the earth's upper mantle or lower crust melts, magma forms. A volcano is essentially an opening or a vent through which this magma and the ...

Why do volcanoes erupt? What creates eruptions? - eSchooltoday

eschooltoday.com

Find out what the earth make-up is, and how extreme pressure build up inside the earth forces molten matter to be expelled out to the surface, causing a volcanic ...

What makes a volcano erupt? | Reference.com

www.reference.com

Volcanoes erupt due to pressure that the weight of the rocks puts on the magma and forces it to the surface out any available vent or exit provided to it.