O-LevelBiologyEcology & Environment5090/21 · Oct/Nov 2018 · Q610 Marks
The diagram shows the location of several features close to a river that runs from mountains into the ocean. [Figure 6.1]
- (a)Describe and explain the possible harmful effects of human activity on the environment at each of the following locations: the agricultural land, the power station.[6]
- (b)Suggest ways in which people in the town could make changes to their activities in order to reduce the harmful impact that they have on the environment.[4]
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 2018). The mark or mark type is shown in brackets.
- [6] (agricultural land) max 4 marks from insecticides / pesticides / fertilisers ; into river/ocean / water; eutrophication AW ; contamination of drinking water; soil erosion / leaching / run-off ; (power station) max 4 marks from * burning + fossil fuels / named fossil fuel ; * release of carbon dioxide / monoxide; * global warming / greenhouse effect or gas ; * death of river or marine life; release of sulfur dioxide / oxides of nitrogen ; acid rain; increase in water temperature ;
- [4] reduce / recycle / re-use ; max 3 marks from list of examples glass/metal/plastic / water / fishing / use of cars or catalytic converters / effluent/carrier bags / greenhouse emissions / fossil fuels / oil / sewage / plant trees /renewable energy;
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