The newest 20 of 25 written questions. Open one to see it on the real paper.
Suggest two limitations of sampling black salamanders in a 100 km? area using a quadrat.
See it on the paper →A company uses a questionnaire to find people’s views about opening a new mine in Greenland. The company sends the questionnaire to 50 men living in Denmark. Suggest two limitations of this sampling method.
See it on the paper →Scientists estimate that the world population of pilot whales is between 430 000 and 1 390 000. Suggest two reasons why there are large variations in the estimates from different scientists.
See it on the paper →A student determines the population of pilot whales around the Faroe Islands over 7 weeks. The table shows the data. week population 1 121 000 2 2 000 3 134 000 4 147 000 5 79 000 6 85 000 7 78 000 The data for one of the weeks is anomalous. week reason Identify which week is anomalous. Give a reason for your choice.
See it on the paper →Scientists estimate that the world population of pilot whales is between 430 000 and 1 390 000. Suggest two reasons why there are large variations in the estimates from different scientists.
See it on the paper →A student determines the population of pilot whales around the Faroe Islands over 7 weeks. The table shows the data. week population 1 121 000 2 2 000 3 134 000 4 147 000 5 79 000 6 85 000 7 78 000 The data for one of the weeks is anomalous. week reason Identify which week is anomalous. Give a reason for your choice.
See it on the paper →Suggest two limitations of sampling white nun orchids in a 1000 km 2 forest using a transect.
See it on the paper →Suggest three ways to improve this investigation.
See it on the paper →Estimating the population of Spodoptera moths using a quadrat has limitations. Suggest two limitations of sampling Spodoptera moths using a quadrat.
See it on the paper →The questionnaire is incomplete and will not allow a conclusion to be made. Suggest a suitable question that will allow a conclusion to be made.
See it on the paper →Suggest two ways to improve the survey.
See it on the paper →The scientist decides that one result in the table is anomalous. Complete the sentence to identify the anomalous result.
See it on the paper →Suggest three reasons why the number of questionnaires returned was fewer than the number of farmers selected for survey. The boundaries and names shown, the designations used and the presentation of material on any maps contained in this question paper/insert do not imply official endorsement or acceptance by Cambridg...
See it on the paper →The government concludes that people in The Bahamas are not concerned about oil processing in The Bahamas. To what extent do you agree with the conclusion? Justify your answer.
See it on the paper →Explain why the mean (average) number of lionfish in 2014 is calculated using data for only two of the areas.
See it on the paper →Another scientist selects ground water sources from only one area of Spain. Describe a limitation of sampling only one area of Spain.
See it on the paper →The questionnaire was used at both the north airport and the south airport. Suggest why the questionnaire was used at both airports.
See it on the paper →Describe one benefit of using the questionnaire when tourists arrive and when tourists leave the island.
See it on the paper →Suggest reasons why method 2 is better than method 1.
See it on the paper →Suggest two pieces of information that the student cannot record about the plastic waste in the Ozama River.
See it on the paper →Comprehensive responses • Many candidates showed understanding that the use of quadrats to estimate the population of black salamanders is not suitable. The most popular answer was that the salamanders can move, leading to miscounting. Another popular answer was that it was time‑consuming. Limited responses • Other answers were sometimes too vague. Some responses did not address the suitability o...
— Examiner report, February/March 2026, 0680/22 Q2(b)(ii) (Cambridge)
Many could identify at least one difficulty of accurately counting a migratory whale species in a large sea/ocean with different sampling methods.
— Examiner report, May/June 2025, 0680/21 Q2(a)(iii) (Cambridge)
Most could state the huge order of difference in whale numbers in week 2 compared to the other values. A few identified week 4 because it was the highest despite it being quite close in size to weeks 1 and 3.
— Examiner report, May/June 2025, 0680/21 Q2(a)(iv) (Cambridge)
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