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Identify the age teak trees reach their maximum height.
See it on the paper →Calculate the average annual increase in tree height over the first 50 years.
See it on the paper →The trees may still continue to grow after 150 years. State the evidence for this from the table.
See it on the paper →Calculate the average circumference of a 50 year old teak tree.
See it on the paper →Calculate the volume of wood that could be harvested from one hectare of this managed teak forest if all the trees are harvested at 50 years old.
See it on the paper →Most candidates were able to correctly interpret the data in the table to identify the age a teak tree reaches its maximum height. The most common error was to quote a range of ages rather than a single age.
— Examiner report, October/November 2019, 0680/12 Q5(a)(i) (Cambridge)
Candidates needed to divide the height reached at 50 years by 50 to calculate the annual increase in height. This calculation proved challenging for many candidates.
— Examiner report, October/November 2019, 0680/12 Q5(a)(ii) (Cambridge)
Most candidates were able to explain that the data showed the diameter of the tree continued to grow while the height of the tree had peaked.
— Examiner report, October/November 2019, 0680/12 Q5(a)(iii) (Cambridge)
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