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Exam (elaborations)

OCR A-Level Geography Updated Exam | Questions and Answers 100% CORRECT

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OCR A-Level Geography Updated Exam | Questions and Answers 100% CORRECT What are the 3 layers of the Earth? Correct Answer: *Crust* *Mantle* *Core* (inner and outer) What separates the crust and the mantle? Correct Answer: *Moho* What 2 layers does the upper mantle consist of? Correct Answer: *Lithosphere* (semi-core) Varies in thickness Boundary with asthenosphere difficult to define (melts and becomes incorporated in asthenosphere) *Asthenosphere* extends 100-300km Semi-molten/viscous - Allows rock to move due to high pressure in mantle. Flowing slowly What are continental and oceanic plates made up of? Correct Answer: Lithosphere and crust Where do convection currents exist? What do these do? Correct Answer: Asthenosphere Caused by vast amounts of heat generated in mantle. Semi-molten asthenosphere flows carrying with it the solid lithosphere and crust. What are the properties of the *continental crust*? Correct Answer: Thickness: 35km average (30-70km) Density: 2.6-2.7 Mineral composition: Mainly granitic, silicon, aluminium What are the properties of the *oceanic crust*? Correct Answer: Thickness:

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Uploaded on
January 7, 2024
Number of pages
126
Written in
2023/2024
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Exam (elaborations)
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Questions & answers

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  • ocr a level geography
  • wha
  • what are the 3 layers of the earth
  • what separates the crust and the mantle
  • what are continental and oceanic plates made up of
  • where do convection currents exist what do these
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