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. ...
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 ...
Volcanic eruptions occur when magma builds up beneath the Earth's crust and
forces its way to the surface. Natural vents in the crust allow magma passage to ...
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
Sep 19, 2016 ... A volcano is a geological feature of the earth where an opening allows magma to
escape from the mantle of the planet.
Aug 5, 2016 ... ... an enormous volcanic eruption. But, have you ever wondered what causes a
volcano to erupt? If you have, this article has the answer for you.
www.ask.com/youtube?q=What Causes A Volcano Eruption&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 ...
Volcanic eruptions happen when lava and gas are discharged from a volcanic
vent ... Volcanic eruptions often cause temporary food shortages and volcanic
Eruptions can cause lateral blasts, lava flows, hot ash flows, mudslides,
avalanches, falling ash and floods. Volcano eruptions have been known to knock