Volcanoes

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Volcanoes

  1. 1. Volcanoes 101
  2. 2. Magma - molten rock under theearthLava - magma that has reachedthe surfaceNon-explosive Eruptions lava flows - rivers of hotlava Lava fountains - sprays oflava from non-explosiveeruptions
  3. 3. Is this an explosive or non-explosive eruption?What is this volcanicformation called?
  4. 4. Explosive Eruptions - clouds of hot gases, lava and solid rock explodeout of volcanoes at super high speeds
  5. 5. Magma compositionWater - The more water the more explosive the volcanowill be, like CO2 in a soda can.Silica - Magma with lots of silica will harden in the ventsand cause a pressure build up and a larger explosion.Less silica means runny lava.
  6. 6. Types of lava1. Blocky Lava2. Pahoehoe3. Aa4. Pillow
  7. 7. Types of Pyroclastic Material1. Volcanic Blocks2. Volcanic Bombs3. Lapilli4. Volcanic Ash
  8. 8. Volcanoes Effect on the Earth1. Flows and Fall out2. Climatic Changes
  9. 9. VolcanoesTypes of volcanoes 1. Cinder cones 2. Shield Cones 3. Composite cones orStratovolcanoes
  10. 10. Label each volcanoTypes of volcanoes 1. Cinder cones 2. Shield Cones 3. Composite cones orStratovolcanoes
  11. 11. Craters Vent Magma ChamberLava Plateaus
  12. 12. Caldera
  13. 13. Lava Plateau
  14. 14. Formation of Magma1. Pressure2. Temperature3. Density
  15. 15. Where do volcanoes occur?
  16. 16. Prediction of Volcanoes1. Measuring small quakes2. Measuring Slope Tiltmeter
  17. 17. 3. Measuring Volcanic Gasses 4. Measuring Temperature from Orbit

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