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 ... from the
core-mantle boundary in a fixed space that causes large-volume melting.
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 ...
What disturbs the peaceful slumber of a volcano and makes it erupt? Find out the
answer and see images of erupting volcanoes on PlanetSEED today.
www.ask.com/youtube?q=What Makes Volcanoes Erupt&v=-kQwudeT3ww
Jun 29, 2013 ... A quick and fun cartoon lesson about volcanoes. ... Why Volcanoes Erupt .....
HOW TO MAKE A VOLCANO Easy Kids Science Experiments ...
May 20, 2009 ... But what's going on, how do volcanoes erupt? ... and temperatures, and this
causes rock to melt and squeeze out of cracks in the rock.
A secondary school revision resource for GCSE Geography covering key facts
about volcanoes and volcanic eruptions.