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. ...
A volcano begins as melted rock (magma) which rises from deep inside the earth
toward the surface. As the gas-filled magma rises ...
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
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 ...
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?
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 ...
Where plates move away from each other at spreading or divergent plate
margins, volcanic eruptions are gentle extrusions of basaltic lava. Most of these
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 ...