Question 1 Report
The diagram in Fig. 1 shows a section through a sand dune at a desert research camp in Qatar. A ranger is deciding where to place a temporary path so that visitors do not climb the steepest face. Wind has blown from left to right across the dune. Table 1 records the angle of each side measured during the study.
| Dune section | Surface angle (degrees) |
|---|---|
| Windward slope | 12 |
| Crest | 4 |
| Leeward slope | 31 |
(a) Which slope is the slip face? [1]
(b) Outline how sand reaches the crest of this dune. [2]
(c) Draw an X on Fig. 1 to show the safer, gentler route for the path. [1]
(a) Leeward slope [1] (b) Wind lifts/moves sand up the gentle windward slope [1]; by saltation/rolling/creep [1]. (c) X on the windward, left-hand gentle slope [1]
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