Make sure the graph fills as much of the page as possible and that students title their graph. Ask students to plot the data points from their data tables on their graphs and draw a line connecting the points. Compare the results of Celsius and Fahrenheit data sheets and graphs. They could then record the actual pressure changes and resulting temperature changes both as the pressure builds and then as it is released. If computer probes are not available, high school students can vary the conditions of the procedure in two ways.
Students can experiment with bottles at room temperature and bottles that have been chilled.
When they have completed their lab, students can write a short explanation of why the varying starting temperatures affected the results of the experiment. This explanation should be based on the concept of gas solubility and its correlation with temperature. Students can also vary the procedure by using bottles of carbonated beverage that are at room temperature but have different volumes. At the end of the experiment students can provide a short explanation of why the results were different for the different volumes of liquid used in the experiment. This explanation should be based on the fact that gases expand to fill containers, and that pressure is a force per unit area.