plumiEvidence for climate change: Edexcel International A Level Biology questions
Edexcel International A Level Biology past-paper questions on 5.4.1 Evidence for climate change, 2019–2025, with mark schemes and examiner’s reports where available.
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Q5(a)
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All 16 questions on Evidence for climate change, as a list
- January 2025, Unit 4, Q5(a) (3 marks): Pollen grains in peat bogs can be used to determine the types of plants that grew in a particular area in the past. The diagram shows the types of pollen (shade
- January 2024, Unit 4, Q4(a)(i) (1 mark): Calculate the mean drop in height from 1980 to 2000. Give suitable units for your answer. (1) Answer
- January 2024, Unit 4, Q6(c) (3 marks): Southeast Asian forests are the oldest rainforests on Earth. Explain how the age of a tree in a rainforest can be determined, without cutting it down. (3)
- January 2023, Unit 4, Q4(c) (3 marks): A rubber tree can be used to harvest rubber until it is about 32 years old. Explain how dendrochronology could be used to determine the age of a tree that is st
- October 2022, Unit 4, Q4(a) (1 mark): The core of mud removed has a diameter of 80 mm and a length of 900 mm. Which is the volume of this core of mud? Use the formula: V = πr2l Use π = 3.142 (1) A 4
- October 2022, Unit 4, Q4(b)(i) (2 marks): Calculate how many years the plants producing type D pollen grains were present in this rainforest. (2) Answer years
- October 2022, Unit 4, Q4(b)(ii) (4 marks): Explain the distribution of these three types of pollen grain in this mud column. Use the information in this diagram to support your answer. (4)
- June 2022, Unit 4, Q8(b)(i) (2 marks): The graph shows the changes in environmental temperature before and after a volcanic eruption. time of eruption 0.2 Change in environmental 0.0 temperature / °C
- June 2022, Unit 4, Q8(b)(iv) (3 marks): The graph shows the levels of carbon dioxide in the atmosphere in one region of the world from 1958 to 2004. During this period there were volcanic eruptions in
- October 2021, Unit 4, Q4(a)(i) (1 mark): Calculate the radius (r) of a tree with a circumference (C) of 8 m. C Use the formula: r = 2π Give your answer to two decimal places. (1) Answer m
- October 2021, Unit 4, Q4(a)(ii) (1 mark): Calculate the distance T as a percentage of this radius. (1) Answer %
- October 2021, Unit 4, Q4(b)(i) (1 mark): Which row of the table shows the newest and oldest rings in this tree? (1) newest ring oldest ring A P Q B P S C S R D S P
- October 2021, Unit 4, Q4(b)(ii) (3 marks): Explain how these core samples can be used to calculate the age of this tree. Use the information in the question and the diagram to support your answer. (3)
- October 2021, Unit 4, Q4(b)(iii) (2 marks): Describe how the growth rate of this tree can be calculated. (2)
- January 2020, Unit 4, Q3(d)(i) (1 mark): Which of the following involves the study of tree rings? (1) A dendrochronology B entomology C epigenetics D proteomics
- January 2020, Unit 4, Q3(d)(ii) (3 marks): Explain why the width of tree rings produced in 1970 would be different from the width of tree rings produced in 2010. (3)
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