9. Students investigated how the volume of a fixed mass of gas at 20 °C varied when the pressure of the gas was increased. They collected a range of data and plotted it on the graph as shown in Fig. 1.11.
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20 40 60 80
(Fig. 1.11 0 50 100 150 Pressure
a. What is missing from this graph? b. What is the independent variable? c. What is the dependent variable? d. Is there a relationship between pressure and the volume for this gas? Explain your answer.
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Past paper questions
1. Sample Paper 2018, Question 3 a. Describe one safety precaution which should be taken when heating water in the laboratory. b. State one advantage of presenting scientific data using a graph.
2. Final Examination 2022, Question 7
A trolley moves along a horizontal track. The distance of the trolley from its starting point was measured every second for 8 seconds. The results are shown in the graph below.