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. The magma is in a reservo...
Several factors trigger volcanic eruptions, including the buoyancy of magma, a build-up of pressure from the gases in the magma and an injection of new magma into a full magma chamber.
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 dissolved gases it contains are discharged.
Erupting volcanoes can pose many hazards, not only in the immediate vicinity ....
they can produce violent, explosive eruptions, but their lava generally does not ...
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 ...
Aug 20, 2015 ... Volcanoes are channels that transfer molten rock from Earth's crust to the ... A
decrease in the density of covering rocks eventually makes them ...
An erupting volcano can trigger tsunamis, flash floods, earthquakes, mudflows
and ... Lava domes are formed when erupting lava is too thick to flow and makes
www.ask.com/youtube?q=What Makes A Volcano 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 ...
There are few geological events that are as dramatic as a volcanic eruption
except maybe a hurricane, tornado or a tsunami. Each is drama.