MontessoriMom.com Education
                    everyone can do.

Volcanoes

New! Free Volcano Printout

 

Volcanoes erupt because the earth's movement causes openings or vents in the crust. Volcanoes can be mountains, vents or under sea rifts. Volcanism is an eruption of molten rock at the earth's surface. Sometimes there is explosive gases and rock fragments.  Magma is soft rock in the earth's mantle. It usually flows into cracks by the earth's surface. When the magma hits the earth's surface, it is called lava. Lava cools, hardens, and forms rocks. This process is part of the rock cycle .

Volcanic eruptions can be similar, but each one is unique. Before each eruption there are several small earthquakes. The magma presses against the upper mantle and breaks through to the earth's surface. The earth moves and the magma pushes to the surface and forms a volcano. The combination of magma and water causes a violent eruption. There is often a big cloud of smoke that is vaporized water, cinders and ash. Most volcanoes are located in an area called the Pacific Ring of Fire .

Free Resources

Archive

 References

Comments

http://www.snoredoc.net

posted at 3:47 a.m. on August 30, 2013

this will surely help me in making my presentation based on the study of volcano. here you have given me a much detailed idea on how volcanoes erupt . i got to know about the scientific reason for this . good share.

Submit Comment

Privacy policy We collect email addresses and names to send out newsletters on occasion. This information is not transferred to any third parties.

To opt-out of future communication and remove the information we collected, enter your email at http://montessorimom.com/ and click "Unsubscribe".

Markdown Syntax

 

Creative Commons License Comments licensed under a Creative Commons Attribution 3.0 United States License.
Last Updated: November 24, 2013
Copyright © 2001-2014 MontessoriMom.com All Rights Reserved