0653.B6.1.05 — Understand and describe the effect of light and dark conditions on gas exchange in an aquatic plant using hydrogencarbonate indicator soluti: past paper questions
Real questions on 0653.b6.1.05 — understand and describe the effect of light and dark conditions on gas exchange in an aquatic plant using hydrogencarbonate indicator soluti
The newest 9 of 9 written questions. Open one to see it on the real paper.
- 0653/06 · Specimen 2025 · Q1bi[1]
Record in Table 1.1 the volume of apple juice remaining in the syringe in experiment 3.
See it on the paper → - 0653/06 · Specimen 2025 · Q1bii[1]
Calculate the volume of apple juice added to the DCPIP in experiment 3. Record your answer in Table 1.1.
See it on the paper → - 0653/06 · Specimen 2025 · Q1biii[1]
Calculate the average volume of apple juice added.
See it on the paper → - 0653/06 · Specimen 2025 · Q2[7]
Plan an investigation to determine the relationship between light intensity and the volume of oxygen gas produced by the aquatic plant. You are provided with the apparatus shown in Fig. 2.1. You may use any other common laboratory apparatus in your plan. In your plan, include: any additional apparatus and chemicals tha...
See it on the paper → - 0653/63 · October/November 2024 · Q1a[1]
The plants are left for 24 hours before θ P is measured. Suggest why the plants are left for 24 hours.
See it on the paper → - 0653/63 · October/November 2024 · Q1b(i)[1]
Explain why keeping the light intensity constant in this way makes it a fair test.
See it on the paper → - 0653/63 · October/November 2024 · Q1b(ii)[1]
Suggest one way that the student makes sure that the light intensity is kept constant.
See it on the paper → - 0653/63 · October/November 2024 · Q1b(iii)[1]
Suggest one other factor that is kept constant in this investigation.
See it on the paper → - 0653/61 · May/June 2022 · Q2[7]
Photosynthesis takes place in aquatic plants (plants that live in water). Photosynthesis produces bubbles of oxygen gas. The greater the rate of photosynthesis, the faster the oxygen is produced. Figure 2.1 shows apparatus used to investigate the effect of light intensity (amount of light) on the rate of photosynthesis...
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What examiners said
Candidates who earned most credit typically took care to address every bullet point. Where apparatus is shown in the question it is not necessary to describe it in words. Some candidates wrote at length about how they would set up the apparatus which was provided. It is only necessary to discuss any changes that could be made. Some common approaches to planning questions are more likely to lead t...
— Examiner report, May/June 2022, 0653/61 Q2 (Cambridge)
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