O-LevelGeographyThe natural environment2217/22 · Oct/Nov 2019 · Q48 Marks
Study Fig. 4.1, which shows the epicentres of the strongest earthquakes, occurring in and around South America, over a period of 7 days.
- (a)(i)Define the term epicentre.[1]
- (a)(ii)Earthquakes can be classified by their intensity. What does intensity measure? Tick the correct answer. Depth of the focus Effects of an earthquake Energy released by the earthquake Size of the epicentre[1]
- (b)(i)Describe the distribution of the earthquakes shown on Fig. 4.1.[3]
- (b)(ii)Suggest why earthquakes are found on plate boundaries.[3]
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
Mark scheme
Marking points from the official mark scheme (Oct/Nov 2019). The mark or mark type is shown in brackets.
- [1] Point on earth’s surface directly above the focus
- [1] Effects of an earthquake
- [3] West/in a line/plate boundary; Pacific coast/Andes/mountains; Land and sea/mostly on land/some in the sea; Clustered/groups
- [3] Movement at different speeds/different directions; Release of pressure; Subduction/subduction described; Mountains forming/uplifting; Volcanoes/magma rising; Trigger each other/aftershocks
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