551 volcanoes tgale

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551 volcanoes tgale

  1. 1. VOLCANOES
  2. 2. Learning Objectives <ul><li>Define volcano </li></ul><ul><li>Describe how volcanoes form </li></ul><ul><li>Explain what causes an eruption </li></ul><ul><li>Name the different types of volcanoes and their main characteristics </li></ul><ul><li>Know where most volcanoes are located </li></ul>
  3. 3. What is a Volcano? <ul><li>An opening in the earth's crust through which molten lava, ash, and gases are ejected. </li></ul><ul><li>A vent connects magma from within the Earth’s crust to the Earth's surface. </li></ul><ul><li>It includes the surrounding cone of erupted material. </li></ul><ul><li>Magma reaching the surface is called lava. </li></ul>
  4. 4. Volcano Formation <ul><li>Magma rises to the Earth’s surface and bursts out. </li></ul><ul><li>Most form along plate boundaries or under the sea at: </li></ul><ul><ul><li>Spreading ridges where plates pull apart. </li></ul></ul><ul><ul><li>Subduction zones where one plate is forced under another. </li></ul></ul><ul><ul><li>Hot spots in the middle of plates when especially hot currents of magma shoot up, burning through the crust. </li></ul></ul>Spreading Ridge Hot Spot
  5. 5. Eruptions <ul><li>Magma, less dense than the solid rock around it, rises and collects in chambers. </li></ul><ul><li>Pressure decreases, trapped gasses expand, and propel magma, causing an eruption. </li></ul><ul><li>Explosive if magma viscous; gasses can not escape; pressure builds; explodes. </li></ul><ul><li>Effusive if magma is fluid; gasses can escape easily; lava flows. </li></ul><ul><li>Build a volcano and watch it erupt . </li></ul>
  6. 6. Different Types of Volcanoes: Composite <ul><li>Most common type. </li></ul><ul><li>Explosive eruptions and lava flow. </li></ul><ul><li>Built from pyroclastic material and lava. </li></ul><ul><li>Example: </li></ul><ul><li>Mt. Rainier, Washington </li></ul>
  7. 7. Different Types of Volcanoes: Shield <ul><li>Built from layers of lava </li></ul><ul><li>Non-explosive eruptions </li></ul><ul><li>Not very steep, but can be big </li></ul><ul><li>Example: </li></ul><ul><li>Mauna Loa, Hawaii </li></ul>
  8. 8. Different Types of Volcanoes: Cinder Cone <ul><li>Built from pyroclastic material </li></ul><ul><li>Moderately explosive, short eruptions </li></ul><ul><li>Small in size, steep slopes </li></ul><ul><li>Example: </li></ul><ul><li>Mauna Kea, </li></ul><ul><li>Hawaii </li></ul>
  9. 9. Where Are They? <ul><li>Volcanoes are located on much of the planet, but there is a high concentration surrounding the Pacific Ocean. </li></ul><ul><li>This area is known as The Ring of Fire. </li></ul>Volcano Locations
  10. 10. Assignment <ul><li>Research and report on a specific volcano </li></ul><ul><li>(ex: Mauna Loa in Hawaii) </li></ul><ul><li>Required details </li></ul><ul><ul><li>Name </li></ul></ul><ul><ul><li>Location </li></ul></ul><ul><ul><li>Type of volcano and main characteristics </li></ul></ul><ul><ul><li>Size </li></ul></ul><ul><ul><li>Last eruption date and status (active, extinct, dormant) </li></ul></ul><ul><ul><li>Picture </li></ul></ul><ul><li>Report options </li></ul><ul><ul><li>Poster, PowerPoint, Video, Essay </li></ul></ul><ul><ul><li>If you have a different idea, ask teacher for approval </li></ul></ul>
  11. 11. Additional Learning Resources <ul><li>Discovery Kids – Build a virtual volcano and watch it erupt, plus more </li></ul><ul><li>http:// kids.discovery.com /games/build-play/volcano-explorer </li></ul><ul><li>National Geographic – Volcano video clips http://video.nationalgeographic.com/video/player/environment/environment-natural-disasters/volcanoes/volcanoes-101.html </li></ul><ul><li>National Geographic Kids - animated movie </li></ul><ul><li>http://magma.nationalgeographic.com/ngexplorer/0405/quickflicks/ </li></ul><ul><li>BBC Newsround – video clips and information </li></ul><ul><li>http://news.bbc.co.uk/cbbcnews/hi/specials/volcanoes/default.stm </li></ul><ul><li>Lessons, activities, videos </li></ul><ul><li>http://science.lotsoflessons.com/volcanoes.html </li></ul>
  12. 12. Content Standards <ul><li>Science Content Standards – CAPA Level V </li></ul><ul><li>SEACO Special Education Guide </li></ul><ul><li>Standard 9/12.3e - Students know there are two kinds of volcanoes: one kind with violent eruptions producing </li></ul><ul><li>steep slopes and the other kind with voluminous lava flows producing gentle slopes </li></ul><ul><li>Alternate Achievement Standard 9/12.3e.A - Know the general characteristics of a volcano. </li></ul><ul><li>FPI S5E9/12.3e.A1 - Will know two types of volcanoes (violent eruptions or voluminous lava flow) </li></ul>

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