0654.B3.1.03 — Describe the importance of diffusion of gases 4 Investigate the factors that influence diffusion, and solutes in living organisms limited to: past paper questions
Real questions on 0654.b3.1.03 — describe the importance of diffusion of gases 4 investigate the factors that influence diffusion, and solutes in living organisms limited to
The newest 11 of 11 written questions. Open one to see it on the real paper.
- 0973/41 · May/June 2024 · Q7c[2]
Alveoli are the gas exchange surface in humans. Gases are exchanged by the process of diffusion. Explain the advantage, in terms of diffusion, of the alveoli being thin and well ventilated. thin well ventilated
See it on the paper → - 0973/32 · May/June 2023 · Q10a(i)[1]
On Fig. 10.1, draw one arrow to represent the net movement of oxygen molecules.
See it on the paper → - 0973/32 · May/June 2023 · Q10a(iii)[2]
Describe one similarity and one difference between diffusion and osmosis. similarity difference
See it on the paper → - 0973/41 · May/June 2023 · Q4d(iii)[1]
The aquatic plant releases less oxygen into the water than it produces during photosynthesis. Suggest one reason for this difference.
See it on the paper → - 0973/41 · May/June 2023 · Q10c[2]
Concentration gradients affect the rate of osmosis. Suggest two other factors that affect the rate of osmosis.
See it on the paper → - 0973/31 · October/November 2022 · Q6a(ii)[2]
Describe how the process named in (i) occurs. Use ideas about water molecules in your answer.
See it on the paper → - 0973/41 · October/November 2019 · Q11b(ii)[1]
Predict how the results of the experiment would be different if chlorine is used instead of bromine.
See it on the paper → - 0973/41 · May/June 2019 · Q7a(i)[1]
Calculate the rate of diffusion for cube A. cm per min
See it on the paper → - 0973/41 · May/June 2019 · Q7a(ii)[1]
Use the results in Table 7.1 to describe the relationship between temperature and the rate of diffusion.
See it on the paper → - 0973/41 · May/June 2019 · Q7a(iii)[1]
State one variable, other than the size of the cubes, that should be kept constant in this investigation.
See it on the paper → - 0973/42 · May/June 2019 · Q10a(ii)[1]
State which cell has the greater rate of diffusion. Give a reason for your answer. cell
See it on the paper →
What examiners said
Some candidates did not realise that the plant used some of the oxygen for respiration. Some suggested that it was used by the plant but did not state the process.
— Examiner report, May/June 2023, 0973/41 Q4(d)(iii) (Cambridge)
The majority of candidates correctly identified at least one factor that affects the rate of osmosis. The most common incorrect response was concentration, which was given in the stem of the question.
— Examiner report, May/June 2023, 0973/41 Q10(c) (Cambridge)
The relationship between temperature and the rate of diffusion was usually correct.
— Examiner report, May/June 2019, 0973/41 Q7(a)(ii) (Cambridge)
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