A student conducts an experiment to determine how the temperature of water affects the time for salt to dissolve in 100 mL of water. The student makes one measurement for each temperature.
What is one way that the student could improve the experiment?
perform multiple trials for each measurement instead of just one
use a different timer for each temperature of water
use a different type of salt for each temperature of water
perform one trial for each measurement but use a different volume of water for each test
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