styles of communication

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styles of communication

  1. 1. In the name of ALLAH, the most beneficent and the most Merciful…
  2. 2. VOLCANOES
  3. 3. <ul><li>PRESENTED TO: </li></ul>
  4. 4. <ul><li>PRESENTED BY: </li></ul>
  5. 5. Contents… <ul><li>What is a volcano? </li></ul><ul><li>Inside of a volcano </li></ul><ul><li>Kinds of volcanoes </li></ul><ul><li>Types of volcanoes </li></ul><ul><li>Underwater Volcanoes </li></ul><ul><li>Ring of Fire </li></ul><ul><li>Volcanologist </li></ul><ul><li>Living with volcanoes </li></ul><ul><li>Volcanoes in Pakistan </li></ul><ul><li>Mud volcanoes </li></ul>
  6. 6. What is a volcano? <ul><li>A volcano is like a chimney in the Earth’s crust where magma flows out. </li></ul>
  7. 7. <ul><li>The inside of the Earth is very hot, and </li></ul><ul><li>some of the solid rock melts to form hot, </li></ul><ul><li>liquid rock called magma. </li></ul><ul><li>The hole of the volcano is called vent. </li></ul><ul><li>When magma leaves the vent it becomes </li></ul><ul><li>Lava. </li></ul>Inside of a volcano
  8. 8. Inner a volcano Vent Hard lava Magma chamber Magma
  9. 9. Volcanic eruption <ul><li>High temperature below the earth surface when exceeds to the extreme limit the magma burst out. </li></ul>
  10. 10. Kinds of Volcanoes Volcanoes Active Volcanoes Dormant Volcanoes Extinct Volcanoes
  11. 11. Kinds of volcano <ul><li>Scientists put volcanoes into three groups: </li></ul><ul><li>An Active volcano is one that is erupting or will soon erupt. </li></ul><ul><li>A Dormant volcano is one that has not erupted for a long time. </li></ul><ul><li>An Extinct volcano is one that has not erupted for more than 10,000 years . </li></ul>
  12. 12. Contents of volcanic eruption <ul><li>Contents: gas, dust, water vapour, lava and ash </li></ul>Gas, dust and water vapour Vent Lava Magma Magma chamber Layers of lava and ash
  13. 13. <ul><li>TYPES OF VOLCANOES: </li></ul><ul><li>Composite volcano </li></ul><ul><li>Ash-cinder volcano </li></ul><ul><li>Shield volcano </li></ul>
  14. 14. Cinder Cone Volcanoes <ul><li>Cinder Cones are the most common type of volcano. Cinder cones are the smallest type of volcano and are circular or oval shaped. </li></ul><ul><li>Example: cinder cone volcano is in Mexico, called the Paricutin. It started growing in 1943, and in just five days, the volcano had grown to 300 feet! </li></ul>
  15. 15. Shield Cone Volcanoes <ul><li>Shield cone volcanoes are huge. They are built mainly from lava flows. After an eruption the lava flows out of the vents and creates sloping sides. Their shape is similar to a warrior’s shield. When a shield volcano erupts it is not usually explosive. </li></ul><ul><li>Example: Mauna Loa is the world’s largest shield cone volcano and also the most active! </li></ul>
  16. 16. Composite Cone Volcanoes <ul><li>Composite cone volcanoes formed from layers of melted rock. They are steep-sided, and cone shaped. This type of volcano usually erupts in a very explosive way, from the viscous magma. The composite cone is the most deadly type of volcano. </li></ul><ul><li>Example: St. Helens is a very famous example of a composite volcano. </li></ul>
  17. 17. Rocks and lava <ul><li>Volcanoes produce lava and rocks we find </li></ul><ul><li>on the Earth’s Surface. Magma forms igneous.rocks. These fragments are called tephra . </li></ul>
  18. 18. Bomb Lapilli Types of tephra Ash Dust
  19. 19. Underwater volcanoes <ul><li>The floor of the ocean is similar to dry land. </li></ul><ul><li>There are flat plains, mountain ridges in the ocean floor. </li></ul><ul><li>There are more volcanoes under the ocean </li></ul><ul><li>than on the land . </li></ul>
  20. 20. Ring of Fire
  21. 21. <ul><li>Special scientists are called volcanologists. </li></ul><ul><li>They study volcanoes in different ways. This </li></ul><ul><li>helps to learn about the volcano’s history </li></ul>Volcanologists Volcanologist’s suit
  22. 22. Living with volcanoes <ul><li>The minerals and chemicals in the lava and ash make soil fertile so it’s good for farming. </li></ul><ul><li>Volcanoes also produce electricity. </li></ul><ul><li>This electricity is called geothermal energy </li></ul><ul><li>and the people use it. </li></ul>
  23. 23. Volcanoes in Pakistan <ul><li>Pakistan has the world largest mud volcano in Balochistan having altitude 300ft. </li></ul>
  24. 24. Mud volcanoes <ul><li>The mud volcanoes are the mixture of sand and rocks with wet mud . </li></ul>
  25. 25. <ul><li>THANK YOU……. </li></ul>
  26. 26. ANY QUESTIONS……..!

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