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
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 ...
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 ...
Jun 30, 2016 ... A volcano is a geological feature of the earth where an opening allows magma to
escape from the mantle of the planet.
The friction causes earthquakes and volcanic eruptions near the edges of the
plates. The theory that explains this process is called plate tectonics. Volcano
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.
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 students-
hope you guys enjoy! Be sure to subscribe if you like it, there ...
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 ...