A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that
allows hot lava ... Large eruptions can affect temperature as ash and droplets of
sulfuric acid obscure the .... L...
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 ...
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
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
Jan 5, 2015 ... 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.
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 ...
An extinct volcano is one which has erupted thousands of years ago and there's
no possibility of eruption. Why do volcanoes erupt? The Earth's crust is made up
www.ask.com/youtube?q=How Do Volcano Erupt?&v=-kQwudeT3ww
Jun 29, 2013 ... A quick and fun cartoon lesson about volcanoes. ... i have an asignment and its
due tomorrow. thanks to you it took half an hour less to do!! :^).
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 ...