Karissa is conducting an experiment on the amount of salt that dissolves in water at different temperatures. What can Karissa do to increase confidence in the results of her experiment? Check all that apply. 1.have another scientist run the same exact procedure in her lab 2.include several other liquids for comparison 3.calculate the average amount of salt that dissolves to summarize findings 4.test water temperature many times with the same procedure 5.make sure the experiment follows a specific procedure that allows other scientists to produce the same findings