Diffusion: past paper questions
Real questions on diffusion
The newest 20 of 216 written questions. Open one to see it on the real paper.
- 0610/31 · May/June 2026 · Q5a[4]
A student investigated the effect of temperature on the movement of dye in two beakers of water. Beaker A contained cold water. Beaker B contained hot water. A drop of dye was added to each beaker and left for five minutes. beaker A beaker B Figure 5.1 Explain the difference in appearance between beakers A and B in Fig...
See it on the paper → - 0610/41 · May/June 2026 · Q1b(i)[3]
Describe and explain the results shown in Table 1.1. (i)
See it on the paper → - 0610/41 · May/June 2026 · Q1b(ii)[3]
The investigation was repeated at a higher temperature. Predict and explain the effect of this on the results.
See it on the paper → - 0610/43 · May/June 2026 · Q5c(i)[3]
Using Figure 5.3, calculate the population of phytoplankton in 0.5 dm 3 on day 4. Give your answer in standard form. Space for working.
See it on the paper → - 0610/43 · May/June 2026 · Q5c(ii)[5]
Identify and explain the phases of growth shown by the phytoplankton in Figure 5.3.
See it on the paper → - 0610/61 · May/June 2026 · Q1a(i)[1]
Figure 1.2 shows part of the thermometer from step 14. Record the temperature shown on the thermometer in the space provided. 50 40 30 Figure 1.3 shows the time taken for the liquid in each test-tube to become the same colour as the liquid in test-tube 1. minutes:seconds minutes:seconds minutes:seconds test-tube 2 test...
See it on the paper → - 0610/61 · May/June 2026 · Q1a(ii)[4]
Prepare a table and record the results shown in Figure 1.3. Convert the times on the stop-clocks to seconds.
See it on the paper → - 0610/61 · May/June 2026 · Q1a(iii)[1]
State a conclusion for the results.
See it on the paper → - 0610/61 · May/June 2026 · Q1a(iv)[2]
State the independent and dependent variables in this investigation. independent variable dependent variable
See it on the paper → - 0610/61 · May/June 2026 · Q1a(v)[1]
The temperature of the hot water decreased during the investigation. Suggest one way of improving the method to reduce this source of error.
See it on the paper → - 0610/61 · May/June 2026 · Q1a(vi)[2]
State two possible sources of error for the method used in step 9.
See it on the paper → - 0610/61 · May/June 2026 · Q1a(vii)[1]
Using a scalpel to cut the beetroot cylinders was a safety hazard. State one safety precaution that would reduce the risk of an injury. Turn over
See it on the paper → - 0610/61 · May/June 2026 · Q1b(i)[4]
Draw a large diagram of the beet leaf shown in Figure 1.4. (i)
See it on the paper → - 0610/61 · May/June 2026 · Q1b(ii)[3]
Line PQ on Figure 1.4 represents the maximum width of the beet leaf. Measure the length of line PQ on Figure 1.4. length of line PQ mm Calculate the actual width of the beet leaf using the formula and your measurement. length of line PQ in Figure 1.4 actual width of the beet leaf Give your answer to one decimal place....
See it on the paper → - 0610/61 · May/June 2026 · Q2[6]
Plan an investigation to determine the effect of temperature on the rate of respiration in yeast.
See it on the paper → - 0610/61 · May/June 2026 · Q3a(i)[1]
State the name of the solution you would use to test a food sample for vitamin C.
See it on the paper → - 0610/61 · May/June 2026 · Q3a(ii)[1]
A sample of potato can be tested to show that it contains starch by adding iodine solution. State the expected result of a positive test.
See it on the paper → - 0610/61 · May/June 2026 · Q3b(i)[2]
State two variables the scientists kept constant in this investigation. The results of the investigation are shown in Table 3.1. potato crop yield / tonnes per hectare 60 32.5 115 40.0 170 43.5 230 45.0 285 44.5 340 44.0 mass of fertiliser used / kg per hectare Table 3.1
See it on the paper → - 0610/61 · May/June 2026 · Q3b(ii)[4]
Plot a line graph on the grid of the data in Table 3.1. (ii)
See it on the paper → - 0610/61 · May/June 2026 · Q3b(iii)[1]
Describe the effect on the potato crop yield of increasing the mass of fertiliser used.
See it on the paper →
What examiners said
Comprehensive responses • Most candidates labelled the axes correctly and gave a linear scale that allowed for the plotted points to occupy at least half of the grid. Limited responses • Some candidates omitted to include units on their axes’ labels. • A few non-linear scales were seen, with equal spacing between 0 and 0.003, and 0.003 and 0.005 mol per dm3 being the most common error. Another re...
— Examiner report, February/March 2026, 0610/62 Q1(c)(iii) (Cambridge)
Comprehensive responses • Many candidates determined the concentration of copper sulfate when the discs took 80 s to rise. Limited responses • A few candidates did not indicate on their graphs how they made their estimations. • A small number of candidates made an indication on the graph, with inaccurate interpolation to the axis.
— Examiner report, February/March 2026, 0610/62 Q1(c)(iv) (Cambridge)
Comprehensive responses • Most candidates measured the length of the chili pepper fruit accurately. These candidates often also used their measurement correctly to determine the actual length of the fruit. Limited responses • Some candidates did not give their answer to three significant figures.
— Examiner report, February/March 2026, 0610/62 Q2(a)(ii) (Cambridge)
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