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What caused the Soufrire Hills Volcano to erupt?
- Essay length: 1832 words
- Submitted: 26/06/2010
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Reviewed by:
crystalclearmagic
The first 200 words of this essay...
What caused the Soufrière Hills Volcano to erupt?
The Caribbean island of Montserrat is situated on a destructive plate boundary. A plate boundary occurs when two of the plates that make up the surface of the earth meet. Underneath Montserrat the Atlantic plate is slowly being forced under the Caribbean plate. This happens because the oceanic plate is denser than continental plate. Convection currents pull the dense Atlantic plate into the mantle where intense heat and friction cause the rock to melt. This molten rock is lighter than the surrounding rock, forcing it to rise through cracks in the in the rock towards the earth's surface.
Molten rock or magma gathers under the volcano until the pressure is so great that it is forced up through a vent towards the surface of the earth. The Soufrière Hills Volcano produces a thick sticky lava called andesite. The lava is so thick that it builds up at the top of the volcano in a dome until it becomes too heavy and the dome collapses. When the dome collapses hot rocks, gases and ash are released from the volcano causing the following hazards. Pyroclastic flows are extremely fast-moving flows of lava,
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Review of essay
Rating: 5 star(s)
Response to the question
The student demonstrates a high level of understanding to the eruption right from the start as their introduction shows a clear knowledge towards the tectonic plate theory which caused the eruption. The answer is well supported by evidence and each point the student makes is clearly supported. This creates a convincing and fluent piece of written work which would score the student very high marks. Their response is very clear as the student has laid out the work under subtitles which helps guide the examiner through the work.
Level of analysis
The level of analysis is excellent. The student supports each point well with evidence and evaluated the evidence they found. Perhaps a bibliography would have been good to show the sources used for this piece of work. The appropriate conclusion was made using well supported material. I would suggest that any diagrams / pictures and so on be sourced accordingly as well to avoid infringing copyright or being accused of plagiarism. The response was coherent and well developed through the use of strong and well selected evidence.
Quality of writing
The spelling and grammar and punctuation were fine. I found one mistake of "slighlty" instead of "slightly". This shows the lack of proof reading which is essential in limiting such silly mistakes. However, one slip up like this would not affect the mark greatly, although the impression on the examiner is not very good. The technical terms were appropriately used and well integrated into the answer. The student does not present their work in one long essay format which is interesting. However, there is no 'right' way to present geography work like this and using subtitles is a sensible way as well as presenting it as one long extended essay.
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