A group of students was investigating the characteristics of local streams and rivers. They decided to do fieldwork at three sites which are shown on Fig. 8 (Insert). The two hypotheses used by the students were: Hypothesis 1: Width, depth and wetted perimeter of the river channel increase downstream. Hypothesis 2: There is a relationship between the size and the roundness of pebbles on the river bed. (a) Before beginning their fieldwork the students received advice from their teacher. [Figure 8]
📋 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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