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Volcanoes

Volcanoes. Part A What are volcanoes?. What is a Volcano?. Hot Lava. Cold Rock. ACTIVE. Z. Z. z. DORMANT. EXTINCT. Mountains that erupt lava. Hawaii. Activity. What helps make explosive eruptions ?. Making a Volcanic Eruption You will need: 2 litre bottle of soda or cola

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Volcanoes

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  1. Volcanoes

  2. Part AWhat are volcanoes?

  3. What is a Volcano? Hot Lava Cold Rock ACTIVE Z Z z DORMANT EXTINCT Mountains that erupt lava Hawaii

  4. Activity Whathelps make explosive eruptions? • Making a Volcanic Eruption • You will need: • 2 litre bottle of soda or cola • 1 roll of mints

  5. Challenge Explain to your Talk Partner or group why the bottled exploded. Maybe a diagram would help?

  6. Activity USGS/Hawaiian Volcano Observatory Photo by J.D. Griggs Bubbles

  7. Inside and below a Volcano vent cone magma chamber Pipe (Conduit)

  8. Why do volcanoes erupt? Hot air Cold air Ocean Cold Crust HotMelt HotMantle Cooler Mantle

  9. How do they erupt? • EXPLOSIVE • EFFUSIVE magma magma Sticky Lots of Bubbles Runny Not many bubbles

  10. How do they erupt? • EFFUSIVE • EXPLOSIVE Sticky Lots of Bubbles! Runny Not many Bubbles Hawaii

  11. Explosive Volcanoes Montserrat Montserrat Ash Fall Pyroclastic Flow Pyroclastic Flow Courtesy of www.swisseduc.ch Pyroclastic Flow

  12. Effusive Volcanoes • ’a’a • Pahoehoe Aaflows Pahoehoe flows Rough Lots of pieces Smooth or Ropy Courtesy of A. Rust Courtesy of A. Rust

  13. Part BIn what ways can volcanoes be hazardous?

  14. Volcanic Hazards Danger to People, Places and Things

  15. What could the hazards be when a volcano erupts?

  16. Volcanic Hazards • Explosive:Burial • Flows burying buildings

  17. Volcanic Hazards • Explosive:Burns • Hot flows burning trees and buildings.

  18. Volcanic Hazards • Explosive:Ash Fall • Ash falling from eruption USGS/Cascades Volcano Observatory Photo by David Wieprecht

  19. Volcanic Hazards Effusive:Lava Flows Pahoehoe flows Courtesy of Swisseduc.ch

  20. Volcanic Hazards • Smelly Gas (Noxious) • Magma loses bubbles • Gas leaks into the air

  21. Danger on the Island C Active B Extinct A Extinct N 3km Where would you like to live on the island?

  22. Part CThe Quiz: How much do you remember?

  23. Brain Challenge Questions about Volcanoes Photo: Tom Pfeiffer / www.volcanodiscovery.com

  24. Brain Challenge V____ e n t What is a volcano? Mountains that erupt . l a v a Cone Lava is very: hotcold Conduit A dormant volcano is: awake asleep M a g m a ________ chamber Why do volcanoes erupt? Hot magma wants to go: up down x p l o s i v e How do volcanoes erupt? Two types: e and effusive . What helps make explosive volcanoes erupt? . b u b b l e s Explosive volcanoes erupt a lot of into the air. a s h Do effusive volcanoes have runny or sticky lava? . r u n n y Can lava burn trees and houses? yes Questions

  25. The End

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