0654.B8.3.03 — Investigate and describe the effects of 4 Explain the effects on the rate of transpiration variation of temperature and wind speed on of var: past paper questions
Real questions on 0654.b8.3.03 — investigate and describe the effects of 4 explain the effects on the rate of transpiration variation of temperature and wind speed on of var
The newest 8 of 8 written questions. Open one to see it on the real paper.
- 0973/42 · May/June 2025 · Q1e[3]
Explain the effects of high winds on transpiration rate in plants.
See it on the paper → - 0973/31 · May/June 2022 · Q10a(ii)[1]
The investigation is repeated at a lower temperature. The statements show some predictions. Tick (3) one box to show the correct prediction. The decrease in mass will be less than in the first investigation. The decrease in mass will be more than in the first investigation. The mass will increase not decrease. The decr...
See it on the paper → - 0973/42 · May/June 2020 · Q10a(i)[3]
Explain the trend seen in the part of the graph labelled X. Include in your answer a reference to water molecules and the name of the part of the leaf where transpiration occurs.
See it on the paper → - 0973/42 · May/June 2020 · Q10a(ii)[1]
State one other factor that affects the rate of transpiration.
See it on the paper → - 0973/41 · October/November 2019 · Q10a(ii)[2]
The student repeats the investigation at different temperatures. Sketch a line on Fig 10.2 to show the expected results. rate of water uptake 0 10 20 30 40 50 temperature / °C Fig. 10.2
See it on the paper → - 0973/41 · October/November 2019 · Q10a(iii)[1]
Suggest a reason for the shape of your graph in (a)(ii).
See it on the paper → - 0973/31 · May/June 2019 · Q7a[2]
Describe the trends shown in Fig. 7.1.
See it on the paper → - 0973/31 · May/June 2019 · Q7c[2]
Complete the graph in Fig. 7.2 to show the effect of humidity on the rate of transpiration. Include on your graph: • labels for both axes • a sketch of a suitable line. Fig. 7.2
See it on the paper →
What examiners said
There was some confusion with some candidates stating that higher wind speeds decrease the transpiration rate. Only the strongest candidates were able to explain this phenomenon in terms of differences in concentration gradient.
— Examiner report, May/June 2025, 0973/42 Q1(e) (Cambridge)
The decrease in mass will be less than in the first investigation was the correct prediction identified by many candidates. All the other predictions were suggested by a few candidates.
— Examiner report, May/June 2022, 0973/31 Q10(a)(ii) (Cambridge)
Many candidates were able to suggest that the rate of transpiration was greater in the lower epidermis than in the upper epidermis. Very few candidates suggested that the rate of transpiration increases and then levels out with increasing temperature.
— Examiner report, May/June 2019, 0973/31 Q7(a) (Cambridge)
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