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VOLCANOES SINGULAR-VOLCANO

VOLCANOES SINGULAR-VOLCANO. Learning Objective To find out why some volcanoes are more violent than others. Don’t forget……. Volcanoes can be. ACTIVE – Have erupted in recent times. DORMANT- ‘sleeping’. EXTINCT – no activity left. Structure of a volcano. Types of Volcanoes.

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VOLCANOES SINGULAR-VOLCANO

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  1. VOLCANOESSINGULAR-VOLCANO Learning Objective To find out why some volcanoes are more violent than others.

  2. Don’t forget…… Volcanoes can be ACTIVE – Have erupted in recent times DORMANT- ‘sleeping’ EXTINCT – no activity left

  3. Structure of a volcano

  4. Types of Volcanoes • a.k.a strato • destructive(convergent) • formed at subduction zone • melted crust,water,C02 • magma sticky (viscous) • steeper cone • layers ash/lava • explosive!!!!!

  5. Gas and steam mix to form huge clouds known as nuee ardentes

  6. constructive(divergent) • hot spot • runny (basalt lava) • cone low • gently sloping sides • eruptions gentle, can last for months.

  7. TASK • Pages 114 OCR GEOG • Make a copy of table 3.2 . Locate them on your map of plate boundaries. Add a column to the table to show the type of plate boundary that each volcano is associated with.

  8. TASK • Use page 114 OCR and internet research. • Produce a table to show the main dangers of volcanoes. • Define each hazard and say whether it is dangerous. Give evidence to support your answers. • Pyroclastic flows, nuee ardentes, lahars, landslides, poisonous gases, lava flows, tephra

  9. So why do people live near them? Tourism

  10. GEOTHERMAL ENERGY

  11. WHERE?

  12. FERTILE SOILS

  13. Wall built from lava RESOURCES CHEMICALS – Sulphur to make sulphuric acid LAVA, TEPHRA- Building materials Church built from white lava

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