students use a balance to determine the mass of a marble is 7.5 grams. a graduated bottle contains 10.0 milliliters of water. when the marble is carefully into lowered the graduated bottle and is completely covered with water the volume of the water containing the marble has increased to 12.5 milliliters. find the density of the marble

An experiment is conducted to see if cats preferred skim milk or 2% milk. a cup of skim milkwas put out for 5 kittens and then measured how much the kittens drank over the course of aday. following a cup of 2% milk was purout for the skittens and then masured how much thekittens drank over the course of a day. the same kittens were used and the milk was served atthe same temperature. it was discovered that the cats liked the 2% milk more than the skimmilk. what is the dependent variable in this experiment?