From the experiment it can be concluded that a material or object which has a density that is lesser than water floats. Also, the object that has a density greater than that of water will sink. This is because density is the measure of the amount of substance that is occupied by an object in a given volume.
Here are some densities computed by a student doing this laboratory experiment. Rock Water Wooden block 3.34 g/cm3 1.00 g/cm3 0.495 g/cm3 The student noticed that the rock sank in water. After the experiment, she put the wooden block in the water and it floated. Use the densities above to explain why.