The newest 20 of 82 written questions. Open one to see it on the real paper.
The list shows five conclusions. Tick (3) two correct conclusions for the data shown in Figure 6.3. The percentage of nests with plastic was above 25% for all species. The percentage of nests with plastic was higher for species C than for species A. The percentage of nests with plastic was highest for species E. The pe...
See it on the paper →Suggest two disadvantages to birds of having nests containing non-biodegradable plastic.
See it on the paper →Describe the sources of methane and the effects of methane pollution on ecosystems.
See it on the paper →Figure 8.2 shows the estimated changes in the methane concentration in the atmosphere from the year 200 to the year 2000. 1800 1600 1400 methane 1200 concentration in the atmosphere / ppbv 1000 800 600 400 200 400 600 800 1000 1200 1400 1600 1800 year 2000 Figure 8.2 The list shows some statements about the data in Fig...
See it on the paper →One consequence of farming can be deforestation. Explain how deforestation can contribute to climate change.
See it on the paper →Some species are threatened with extinction. Explain the reasons why species become endangered.
See it on the paper →Chickens can be farmed intensively. Describe two disadvantages of intensive livestock production.
See it on the paper →Describe the effects of excess fertiliser on aquatic ecosystems.
See it on the paper →Suggest which species in Table 6.1 is the least tolerant of pollution.
See it on the paper →Complete the sentences about the atmosphere. Combustion of fossil fuels the concentration of carbon dioxide in the atmosphere. Another gas that has a similar effect on the atmosphere to carbon dioxide is . This causes an greenhouse effect and leads to
See it on the paper →Using the information in Fig. 5.1, state the five‑year period which shows the greatest increase in rice production. from to
See it on the paper →Using the information in Fig. 5.1, calculate the percentage increase in rice production from 1960 to 1990. Give your answer to the nearest whole number. Space for working.
See it on the paper →One of the disadvantages of intensive farming of livestock is that untreated sewage from the animals can enter aquatic ecosystems. State two effects of untreated sewage on aquatic ecosystems.
See it on the paper →Complete the sentences about pollution of the air by writing the appropriate words or phrases in the spaces provided. Methane is a pollutant gas that contributes to the enhanced and climate change. Methane is released into the atmosphere from cattle and from the farming of crops. is a gas that is absorbed by trees in t...
See it on the paper →Chicken faeces can be used as a fertiliser. Chicken faeces spread on agricultural land near lakes can act as a pollutant, and cause the destruction of the freshwater habitat. Explain how the use of chicken faeces near freshwater lakes can lead to habitat destruction.
See it on the paper →State the smallest size of a macroplastic in millimetres. .mm
See it on the paper →Fig. 7.1 shows the mass of plastic pollution caused by macroplastics and microplastics in shallow coastal waters between 1950 and 2010. 120 100 mass of plastic / tonnes 80 60 40 0 1950 1960 1970 1980 year key: macroplastic microplastic 1990 2000 2010 20 Fig. 7.1 Describe the changes in the masses of macroplastics and m...
See it on the paper →Describe two ways that plastics can harm animals in the ocean.
See it on the paper →Apart from plastics, state one other source of pollution in aquatic ecosystems.
See it on the paper →The population of chambo fish has decreased over the past twenty years. Suggest two reasons for the decrease in the population of chambo fish.
See it on the paper →The majority could not convert cm to mm – answers ranged from 5000 to 50.
— Examiner report, May/June 2025, 0610/31 Q7(a)(i) (Cambridge)
A few got the types of plastic the wrong way round. Some stated that macroplastics and microplastics were present from the start, or 1960. Many got the mark for macroplastics increasing, but they found it difficult to express the change in microplastics correctly with the appropriate years. Several only got half the story and did not make relevant comparisons. Many did not make correct data quotes...
— Examiner report, May/June 2025, 0610/31 Q7(a)(ii) (Cambridge)
Most candidates gave at least one correct answer, usually about eating the plastics or getting tangled. Some described damage to the ecosystem, or toxin release rather than damage to the individual animal. Frequently the idea of blocking out sunlight leading to eutrophication was mentioned.
— Examiner report, May/June 2025, 0610/31 Q7(b) (Cambridge)
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