16 Use your knowledge and understanding from across the course of study, along with the information in Figure 4, to answer this question. 4 Study Figures 4a, 4b, 4c and 4d in the Resource Booklet. Evaluate the view that the risks from tectonic activity in Villarrica National Park outweigh those from glacial processes. 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.................................................................................................................................................................................................................................................................................... 17 Turn over .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... 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(Total for Question 4 = 16 marks) TOTAL FOR SECTION B = 62 MARKS 19 Turn over SECTION C: COASTAL LANDSCAPES AND CHANGE Do not answer Section C (Coastal Landscapes and Change) if you have answered Section B (Glaciated Landscapes and Change). If you answer Section C put a cross in the box . You must use the Resource Booklet provided. 5 (a) Define the term ‘eustatic sea level change’. (1) .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... (b) Study Figure 5a below which shows two samples of nine pebbles on a beach on the east coast of England. A t-test can determine if there is a significant difference between the two sets of data. Average size of 9 pebbles at the backshore Average size of 9 pebbles at the foreshore Mean pebble size 38 25 Standard deviation 8.1 6.2 Figure 5a (i) Using the partially completed Student’s t-test below, calculate the value of t. Give your answer to 1 decimal place. (1) t x x S N S N = − + 1 2 1 2 1 2 2 2 13 3.4 = t = ............................................... 20 (ii) Identify the significance level of your t-test result using Figure 5b in the Resource Booklet. (1) .................................................................................................................................................................................................................................................................................... (iii) Suggest one reason for the difference in pebble size. 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(c) Explain two economic reasons why coastal recession is significant. 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.................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... 22 (e) Assess the importance of subaerial processes in contributing to the rate of coastal recession. 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(Total for Question 5 = 28 marks)