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 ...
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 ...
The friction causes earthquakes and volcanic eruptions near the edges of the
plates. The theory that explains this process is called plate tectonics. Volcano
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 ...
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 ...
A secondary school revision resource for GCSE Geography covering key facts
about volcanoes and volcanic eruptions.
May 20, 2009 ... To understand how volcanoes erupt, you have to consider the structure of ... and
this causes rock to melt and squeeze out of cracks in the rock.
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 ...
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