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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. ...

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 Volcanoes Erupt - Universe Today


May 20, 2009 ... Although volcanoes can look different, they're all created because of the same event; magma from beneath the Earth reaches the surface and ...

Volcanoes - Weather Wiz Kids weather information for kids


An erupting volcano can trigger tsunamis, flash floods, earthquakes, mudflows and rockfalls. Volcano ... Volcano Why does lava take a long time to cool down?

Explainer: why volcanoes erupt - The Conversation


Aug 4, 2015 ... What happens beneath the surface before a volcano erupts? ... Mirzam Abdurrachman does not work for, consult, own shares in or receive ...

www.ask.com/youtube?q=How Does A Volcano Erupt&v=-kQwudeT3ww
Jun 29, 2013 ... A quick and fun cartoon lesson about volcanoes. Great for teachers and students- hope you guys enjoy! Be sure to subscribe if you like it, there ...

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 ...

Explainer: Why volcanoes erupt - ABC News (Australian ...


Aug 5, 2015 ... Some people believe volcanic eruptions are caused by fate. ... But if the pathway does not exist, then magma will force itself to an area that has ...

Volcanic Eruptions | Scholastic.com


How long does it take for a volcano to cool? How many volcanoes erupt every day? Expert volcanologist Dr. Stanley Williams answers students' questions.

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


Nov 29, 1999 ... 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 ...

How Does a Volcano Erupt?
A volcano marks a vent where magma, or molten rock, reaches the Earth’s surface in the form of lava and associated materials. While many people envision a conical peak when they think of a volcano, a wide variety of landforms fall into the... More »
Difficulty: Easy
Source: www.ehow.com
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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 ...

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


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. Henry Fountain  ...

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 ...