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Ch. 3  Sec. 1 Volcanoes & Plate Tectonics
<ul><li>weak spot in crust where molten material comes to surface </li></ul>http://www.youtube.com/user/NyeTunes#p/u/89/HU...
 
magma <ul><li>molten rock from mantle beneath Earth's surface </li></ul>
lava <ul><li>magma that reaches surface  </li></ul>http://www.youtube.com/watch?v=K9iZd6wzlCk&feature=related
pillow lava lava entering the ocean
buried road in Hawaii
After lava has cooled, it forms solid rock.
 
<ul><li>Although you might not wish to touch lava with a &quot;ten foot pole“, this potentially hazardous activity is all ...
Ring of Fire <ul><li>major volcanic belt formed by many volcanoes that rim Pacific Ocean </li></ul>
Volcanic belts form along the boundaries of Earth’s plates.
Ring of fire
most  volcanoes occur: along diverging plate boundaries along  converging plate boundaries mid-ocean  ridge in  subduction...
volcanoes at converging boundaries subduction causes oceanic crust to sink through a deep-ocean trench into mantle   crus...
Volcanoes often form where two oceanic plates collide or where an oceanic plate collides with a continental plate. In both...
island arc <ul><li>string of islands created  by volcanoes </li></ul><ul><li>examples:  </li></ul><ul><li>Japan </li></ul>...
 
hot spot <ul><li>area where magma from deep within mantle rises & melts thru. crust  </li></ul><ul><li>can occur: </li></u...
Hot Spot Volcanoes <ul><li>A volcano forms above a hot spot when magma erupts through the crust and reaches the surface. <...
 
 
The Hawaiian Islands formed one by one over millions of years as the Pacific plate drifted over a hot spot.
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6th Grade Ch. 3 Sec. 1 Volcanoes and Plate Tectonics

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Transcript of "6th Grade Ch. 3 Sec. 1 Volcanoes and Plate Tectonics"

  1. 1. Ch. 3 Sec. 1 Volcanoes & Plate Tectonics
  2. 2. <ul><li>weak spot in crust where molten material comes to surface </li></ul>http://www.youtube.com/user/NyeTunes#p/u/89/HUCBf058hoA
  3. 4. magma <ul><li>molten rock from mantle beneath Earth's surface </li></ul>
  4. 5. lava <ul><li>magma that reaches surface </li></ul>http://www.youtube.com/watch?v=K9iZd6wzlCk&feature=related
  5. 6. pillow lava lava entering the ocean
  6. 7. buried road in Hawaii
  7. 8. After lava has cooled, it forms solid rock.
  8. 10. <ul><li>Although you might not wish to touch lava with a &quot;ten foot pole“, this potentially hazardous activity is all in a day's work for a volcanologist. </li></ul><ul><li>The long pole contains a special probe that can measure the temperature of the lava. </li></ul>
  9. 11. Ring of Fire <ul><li>major volcanic belt formed by many volcanoes that rim Pacific Ocean </li></ul>
  10. 12. Volcanic belts form along the boundaries of Earth’s plates.
  11. 13. Ring of fire
  12. 14. most volcanoes occur: along diverging plate boundaries along converging plate boundaries mid-ocean ridge in subduction zones
  13. 15. volcanoes at converging boundaries subduction causes oceanic crust to sink through a deep-ocean trench into mantle  crust melts & forms magma  magma rises back to surface  forms volcanoes
  14. 16. Volcanoes often form where two oceanic plates collide or where an oceanic plate collides with a continental plate. In both situations, an oceanic plate sinks through a trench. Rock above the plate melts to form magma, which then erupts to the surface as lava.
  15. 17. island arc <ul><li>string of islands created by volcanoes </li></ul><ul><li>examples: </li></ul><ul><li>Japan </li></ul><ul><li>New Zealand </li></ul><ul><li>Caribbean islands </li></ul><ul><li>Phillipines </li></ul>
  16. 19. hot spot <ul><li>area where magma from deep within mantle rises & melts thru. crust </li></ul><ul><li>can occur: </li></ul><ul><ul><li>in middle of plates </li></ul></ul><ul><ul><li>on or near plate boundaries </li></ul></ul><ul><ul><li>under continents </li></ul></ul><ul><li>eg: </li></ul><ul><ul><li>Hawaii </li></ul></ul><ul><ul><li>Yellowstone National Park </li></ul></ul>
  17. 20. Hot Spot Volcanoes <ul><li>A volcano forms above a hot spot when magma erupts through the crust and reaches the surface. </li></ul>
  18. 23. The Hawaiian Islands formed one by one over millions of years as the Pacific plate drifted over a hot spot.
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