ACSI 2025 Prelims P1 HL QP - Ans

1 Anglo-Chinese School (Independent) PRELIMINARY EXAMINATION 2025 IB DIPLOMA PROGRAMME YEAR 6 (IBDP 2) Geography Higher Level Paper 1 Tuesday 2 September 2025 2 hours 15 minutes Instructions to candidates • Write your class and candidate number on this cover page. • Do not open this examination paper until instructed to do so. • Answer the questions in three options. • The accompanying geography resource booklet is required for this examination paper. • Use examples, maps and/or diagrams where relevant. • The maximum mark for this examination paper is [60 marks]. • Please attach this cover sheet to the answer script. Class: …………………………………. Candidate number 0 0 2 3 2 9 Marks Option D – Geophysical hazards /20 Option E – Leisure, tourism and sport /20 Option G – Urban environments /20 Total /60 _______________________________________________________________ This question paper consists of 4 printed pages.

2 Answer the questions in three options. When relevant, answers should refer to case studies or examples, and where appropriate include well‑drawn maps or diagrams. Option D – Geophysical Hazards Answer the following question. 1. Refer to the map on page 2 of the accompanying resource booklet. The map shows the lahar hazard zones of Kanloan Volcano in the Philippines. (a) Describe the direction and range of the lahar hazard. [2] The Lahar Hazard Map of Kanlaon Volcano shows that lahar hazards extend radially from the volcano along river valleys and drainage pathways. [1m] [Award 1m for any of the following] West & Southwest (La Carlota City, La Castellana): • High to moderate hazard zones extend up to 16 km, affecting multiple barangays and settlements. South & Southeast (Moises Padilla): • Lahars can reach 10–14 km, with high hazard zones concentrated within ~8 km of the summit. Northeast & East (San Carlos City, Vallehermoso, Canlaon City): • Hazards extend 10–12 km, but generally in narrower pathways following rivers. Northwest (Murcia, Bago City): • Hazard zones stretch up to 12–16 km, with moderate to low hazard levels dominating the outer areas. (b) Outline one reason why some places may be at greater risk of lahars. [2] [1m for the reason, 1m for the explanation] • Proximity to the volcano: Settlements closer to Kanlaon’s slopes face higher hazard levels because lahars are more concentrated and faster-moving near the source. • Location along river valleys: Lahars follow drainage channels, so communities, farms, and infrastructure built along rivers are directly in their path. • Population density and land use: Densely populated towns, built-up areas, and agricultural land in low-lying floodplains are more vulnerab