O-LevelGeographyThe natural environmentMay/June 2013Paper 2 Q830 Marks
Two groups of students were investigating the characteristics of a local river which flowed for 15 km from its source to the sea. They wanted to investigate possible reasons for changes in velocity (speed of flow) downstream. They carried out their fieldwork at five sites along the course of the river. They decided to test the following hypotheses: Hypothesis 1: Velocity increases as the river bed slopes more steeply. Hypothesis 2: Velocity increases as the wetted perimeter of the river channel increases.
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
🎯 Mark Scheme Breakdown
Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.
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