A student set up an experiment to determine whether distilled water cooled faster than tap water. The student used the following procedure: 1. Fill a 150 mL beaker with 100 mL distilled water and a 250 mL beaker with 100 mL tap water. 2. Heat the water in both beakers to their boiling point on a hotplate. 3. Allow the water in both flasks to cool while still sitting on the desktop. 4. Record readings of the water temperature in each beaker every 1 minute for 30 minutes. 5. Produce a graph of the temperature of the water in each flask versus time for both samples. The student then plotted the data and determined that tap water cools faster than distilled water. Identify the correct assessment of the student's results below. The student changed more than one variable, so no conclusion can be drawn from the results of the experiment. This experiment correctly demonstrated the distilled water cools faster than tap water. The student changed two variables, so it is actually tap water that cools faster than distilled water. The student didn't need to do the experiment in the first place. because the student went online and read on a website that tap water cools faster.