Friday, January 21, 2011

Bill Nye The Science Guy; Volcanoes

Notes about volcanoes
  • Lava makes a layer of land when it dries on land
  • Volcanoes form when hot molten rock finds its way to the surface
  • Volcanoes can transform entire valleys
  • Different types of volcanoes
  • Don't always explode when erupt
  • Some volcanoes ooze - over a thousand degrees Celsius
  • Volcanoes usually occur when plates pass each other
  • Magma plume splutters like smoke on a chimney
  • Pressure builds up and islands build up
  • Lava flows under the surface
  • Shield - Flat, Caldera - Deep hole, and cone
  • Once in a while, ground collapses and you can see it
  • Sometimes lava flowing makes lava tubes
  • Volcanic landscapes turn into lush, giving plants growing some nutrients
  • Some volcanoes explode
  • Volcanoes are a window to the under world
  • Lava can move rivers and lakes

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