0654.B8.3.02 — State that water evaporates from the surfaces of the mesophyll cells into the air spaces and then diffuses out of the leaves through the sto: past paper questions
Real questions on 0654.b8.3.02 — state that water evaporates from the surfaces of the mesophyll cells into the air spaces and then diffuses out of the leaves through the sto
The newest 8 of 8 written questions. Open one to see it on the real paper.
- 0973/41 · May/June 2024 · Q4a(i)[5]
Complete the sentences to describe and explain the results shown in Fig. 4.2. The mass of the plant kept at 40 °C decreased in mass by g between day 1 and day 5. As temperature increases, the water molecules gain more energy. This increases the rate of evaporation from the surfaces of the cells. There is also an increa...
See it on the paper → - 0973/41 · May/June 2024 · Q4a(ii)[1]
State how an increase in humidity would affect the results shown in Fig. 4.2.
See it on the paper → - 0973/31 · May/June 2022 · Q10b[1]
State the process by which water is lost from the surfaces of the mesophyll cells during transpiration.
See it on the paper → - 0973/31 · October/November 2021 · Q9a[1]
The freezing compartment at the top of the refrigerator cools all the air in the refrigerator. State the main method of thermal energy transfer used in this cooling process.
See it on the paper → - 0973/31 · October/November 2021 · Q10d(ii)[3]
Complete the sentences to define the term transpiration. Transpiration is loss of water vapour from plant by evaporation of water at the surfaces of the mesophyll followed by diffusion of water vapour through the
See it on the paper → - 0973/41 · October/November 2019 · Q3a(i)[1]
The air in the oven is heated by the heating element. On Fig. 3.1 draw an arrow to show how the heated air moves inside the oven.
See it on the paper → - 0973/41 · October/November 2019 · Q3a(ii)[1]
Name the main method of thermal energy transfer in the heated air.
See it on the paper → - 0973/31 · May/June 2019 · Q7b[1]
Water vapour is lost through the stomata during transpiration. Suggest a reason for the difference between the rate of transpiration in the upper and lower epidermis.
See it on the paper →
What examiners said
Evaporation was well known as the process by which water is lost from the surfaces of the mesophyll cells during transpiration. Respiration and osmosis were suggested by a few candidates.
— Examiner report, May/June 2022, 0973/31 Q10(b) (Cambridge)
Some candidates related the difference in transpiration rates to stomata. Very few stated that the lower epidermis has more stomata.
— Examiner report, May/June 2019, 0973/31 Q7(b) (Cambridge)
Past papers, syllabus and examiner reports © UCLES (Cambridge University Press & Assessment). Questions are matched to topics from the official syllabus. AssessPro is independent and not endorsed by Cambridge.