Volcaniceruption

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Volcaniceruption

  1. 1. How a volcano erupts ‘ A’ student work Annamarie Moraytis
  2. 2. Volcanoes are “ Pressure valves that releases energy from deep within the Earth. Beautiful and powerful, awe-inspiring and deadly, they are spectacular reminders of the dynamic forces that continually shape our planet.” DiscoveryKids website
  3. 3. Plate tectonics <ul><li>Glide </li></ul><ul><li>Different speeds and directions </li></ul><ul><li>Rub, collide, slip </li></ul><ul><li>Create mountain/volcano </li></ul>
  4. 4. Volcanic eruption <ul><li>Deep in the Earth it is so hot some rocks slowly melt </li></ul>
  5. 5. Volcanic eruption <ul><li>Become a thick flowing substance called magma. </li></ul>
  6. 6. Volcanic Eruption <ul><li>Magma is lighter than the solid rock around it, and rises and collects in magma chambers. </li></ul>
  7. 7. Volcanic Eruption <ul><li>Magma pushes through vents and fissures in the Earth's surface. </li></ul><ul><li>Photo is a vent on Earth’s surface </li></ul>
  8. 8. Volcanic Eruption <ul><li>A volcanic eruption occurs! Magma that has erupted is called lava. </li></ul>
  9. 9. Volcanic eruptions can be <ul><li>Explosive </li></ul><ul><li>Not Explosive </li></ul>
  10. 10. Some volcanoes cause global effects <ul><li>Mt. St. Helen’s, Washington State USA 1980 </li></ul><ul><li>Mt. Pinatubo, Philippines 1991 </li></ul>

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