Monthly Archives: November 2014

L6 – Volcanoes essay for Monday

Describe and explain the distribution of volcanoes (10 marks)

HINTS

  • Make sure you have a clear structure – write an introduction, then describe where they occur, followed by a section explaining why volcanoes occur there
  • In the introduction, define ‘Volcano’, e.g. ‘A volcano is a point where magma has risen from below the Earth’s surface and been ejected above ground’.
  • Next describe the global distribution of volcanoes, e.g. ‘Volcanoes can be found all along the mid-Atlantic Ridge. They are also found around the edges of the Pacific Ocean (Ring of fire), particularly around Japan and Indonesia, and along the west coast of America. They are also found in the centre of the Pacific Ocean in Hawaii’.
  • Now explain why volcanoes happen at each of the locations you have described. Make sure you use appropriate language, e.g. ‘The mid-Atlantic Ridge is a constructive boundary. Here the mantle is under pressure from the overlying plates, and when they move apart pressure is released and the mantle melts, forming magma. This is less dense than the plates so it rises and can erupt to form a volcano.
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L6 Forgotten questions!

The questions I had asked you to do (and then forgot to put on the blog!) are:

  1. Why should we question the data about natural hazards and disasters?
  2. Outline the trends in global disasters – geophysical, hydro meteorological and biological.
  3. Suggest why the number of disasters has increased but the number of deaths has fallen.
  4. Why have a) the costs of disasters and b) the numbers of people affected risen sharply?
  5. Suggest why Asia has the greatest number of deaths from natural disasters.
  1. Plus Extra reading

http://www.lancs.ac.uk/staff/gyaccp/hazards/default.htm

For Wednesday please!

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