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. ...
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
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 ...
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 ...
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
Aug 4, 2015 ... What happens beneath the surface before a volcano erupts? ... Mirzam
Abdurrachman does not work for, consult, own shares in or receive ...
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
An erupting volcano can trigger tsunamis, flash floods, earthquakes, mudflows
and rockfalls. Volcano ... Volcano Why does lava take a long time to cool down?
A volcano begins as melted rock (magma) which rises from deep inside the earth
toward the surface. As the gas-filled magma rises ...
A volcano erupts through the build-up and release of pressure, whether that
pressure is of its underlying magma, water or both. This release can be explosive