4. CONDUCT AN EXPERIMENT OR TEST THE HYPOTHESIS We made a prediction that ice will melt faster in juice than in water, and now we must test our hypothesis. We set up an experiment with a glage of juice, a glass of water and an ice cube for each. For the best experiments, only one thing should change! Here, we are changing the type of liquid we use but keeping the ice cube, the temperature, and measurements of the liquid the same. If too many factors change at once, you cannot accurately state what the results are, The liquids should be roughly the same temperature (as close as possible) and measured to the same amount, so we left them out to come to room temperature. This could also be tested right out of the fridge! Set up a stopwatch or set a time limit to observe the changes!