Share Presentation:   http://NeoK12.com/pres/ZVOLCAN3
Amazing facts about Volcanos
  
Soufriere Hills Volcano Resumes Activityby NASA Goddard Photo and Video on Flickr

The name "volcano" has its origin from the name of vulcan a god of fire in Roman mythology.

As pressure in the molten rock builds up it needs to escape somewhere. So it forces its way up fissures which are narrow cracks in the earths crust. Once the magma erupts through the earth’s surface it’s called lava.lava is liquid rock (magma) that flows out of a volcano. Fresh lava ranges from 1,300° to 2,200° F 700° to 1,200° C in temperature and glows red hot to white hot as it flows.

volcano

Slide Options : Move UP,   DOWN,   DELETE,   Insert BLANK Slide
Arenalby Clearly Ambiguous on Flickr

  • There are about 1500 active volcanoes in the world that have erupted in the past 10,000 years.
  • The biggest volcano in the world is Mauna Loa in Hawaii.
  • More than 80% of the Earth’s surface is volcanic in origin.
  • The rock debris carried by the blast of Mount St. Helen’s eruption traveled as fast as 250 miles per hour!
  • More than half of the world’s active volcanoes above sea level encircle the Pacific Ocean to form the “Ring of Fire”
  • Jupiter’s Moon Io is the most volcanic place in the solar system.
Slide Options : Move UP,   DOWN,   DELETE,   Insert BLANK Slide
Arenalby Clearly Ambiguous on Flickr

More then 5oo volcanoes vents have been identified in the state of california at least 76 of these vent have erupted some repeatedly mount shasta has been inhabited since at least 600 bc 9000 years of native american people  
Slide Options : Move UP,   DOWN,   DELETE,   Insert BLANK Slide
DSCF3301by Philby on Flickr

There are around 1510 'active' volcanoes in the world. We currently know of 80 or more which are under the oceans.The Earth's crust is made up of huge slabs called plates, which fit together like a jigsaw puzzle. These plates sometimes move.

Between the Earth's crust and the mantle is a substance called magma which is made of rock and gases.

When two plates collide, one section slides on top of the other, the one beneath is pushed down.  magma is squeezed up between two plates.

Slide Options : Move UP,   DOWN,   DELETE,   Insert BLANK Slide

 Share this Presentation:  http://NeoK12.com/pres/ZVOLCAN3NeoK12.com - Educational Videos, Lessons, Quizzes & Presentations