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Volcano - Wikipedia


A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava ... Large eruptions can affect temperature as ash and droplets of sulfuric acid obscure the .... L...

USGS FAQs - Volcanoes General - How Do Volcanoes Erupt?


Some volcanic eruptions are explosive and other are not. How explosive an eruption is depends on how runny or sticky the magma is. If magma is thin and ...

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


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).

How It Happens | Volcanic Eruptions - Video - NYTimes.com


Jan 5, 2015 ... The eruption of a volcano can be one of the planet's most destructive events — spewing huge amounts of rock, gas and ash that can kill people.

Why do volcanoes erupt? | Reference.com


Hot melted rocks collect under the Earth's surface and when the pressure becomes too hard, the Earth's skin breaks, and a volcano erupts. The melted rock  ...

What causes a volcano to erupt and how do scientists predict ...


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 ...

Volcanoes - Weather Wiz Kids weather information for kids


An extinct volcano is one which has erupted thousands of years ago and there's no possibility of eruption. Why do volcanoes erupt? The Earth's crust is made up  ...

What causes a volcano erupt?


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

www.ask.com/youtube?q=How Do Volcano Erupt?&v=6CBnqZkascs
May 15, 2015 ... Volcano eruption - Lava Volcano erupting - Hawaii volcano - Lava lake - Lava ... does anyone know the name of the piano song at @5:23 ?
www.ask.com/youtube?q=How Do Volcano Erupt?&v=R0Zbj7S22zs
Mar 5, 2008 ... a video of a volcano erupting with big flames. ... We learnt this today in school for english about volcanos 22nd February 2016. Read more.
How Volcanoes Work
How Volcanoes Work
Whenever there is a major volcanic eruption in the world, you'll see a slew of newspaper articles and nightly news stories covering the catastrophe, all stressing... More »
Source: www.howstuffworks.com
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How Do Volcanoes Erupt? - Universe Today


May 26, 2016 ... Volcanic eruptions are driven by a combination of mechanisms, which include pressure and heat in the Earth's mantle, as well as tectonic ...

Why do volcanoes erupt? What creates eruptions? - eSchooltoday


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 ...

How do volcanoes erupt? | Reference.com


Volcanic eruptions can either be effusive or explosive. An effusive volcanic eruption occurs when the lava pours out onto the ground from the volcano's vent.