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6. when was the Japan Tsunami

  • 11th June 2010
  • 11th March 2011
  • 26th April 2011
  • 15th March 2011

7. how much volume of material is exploded from a super volcano

  • 500000 km3
  • 1435 km3
  • 1000 km3
  • 1 km2

8. where are oceanic trenches found and how deep are they

  • destructive plate boundaries, 5,000-10,000m deep
  • collision boundary, 10,000-15,000m deep
  • constructive boundary, 5,000-10,000m deep
  • conservative boundary, 8,000-10,000m deep

9. what is a phyroclastic flow

  • magma chamber and earths crust
  • horizontal eruption of ash gas and volcanic bombs that can travel 200km per hour
  • eruption of lava
  • ash flow

10. give 2 examples of issues with land use in the alps

  • soil becomes stony and infertile and every 100m up it gets 1 degree cooler so hard for growing crops
  • soil becomes less stony and there is lots of flat land for farming
  • roads and rail ways cheap to build and easy access

11. give 4 advantages of living near a volcano

  • loss of life, buildings destroyed, damage, visit geysers in iceland
  • fertile slopes of m.t etna grow loverly tomatoes, geothermal energy in iceland, blue lagoon spa, after lava weathers fertile soil
  • thermal waters, infertile soil, very safe, injury

12. collision plate

  • two plates rubbing together causing earthquakes or move in the same direction but at different speeds
  • fold mountain
  • Two plates that push together and are forced up forming a fold mountain
  • two plates pulling apart splitting land
  • Two plates that push together one gets subducted beneath another

13. what is a geosyncline

  • bowl shaped hole
  • a depression between two plates
  • gap in a plate
  • a river

14. when was the Montserrat volcanic eruption

  • July 1995
  • July 2001
  • August 1995
  • April 1976

15. oceanic crust is older than continental crust

  • False
  • True
  • Not sure

16. What is the mantle

  • mainly iron and melted rock- 2200km deep
  • soft like molten or melted rock - 2900km deep
  • solid rock - 1600km thick 5500 degrees
  • Solid Rock 8-65km thick

17. what is the outer core

  • solid rock - 1600km thick 5500 degrees
  • mainly iron and melted rock- 2200km deep
  • Solid Rock 8-65km thick
  • soft like molten or melted rock - 2900km deep

18. give 4 disadvantages of living near a volcano

  • loss of life, injury, loss of property, loss of infrastructure
  • great agriculture, ash contaminates water supply, mining from earthquakes, oil seeps through plates
  • geothermal energy, blue lagoon spa, loss of communication, tourism

19. how are calderas formed

  • formed when the magma chamber collapses after an eruption leaving a large bowl shape ground (depression)
  • eruption occurs
  • volcanic winter
  • large bowl shape

20. large land slabs (continents) joined together millions of years ago are called

  • Plate
  • Plangea
  • Tephra
  • Lahar