Glass Eye Dropper Lab Report

During an experiment, there was a glass eye dropper placed into a bottle filled to the brim with water with the cap closed. The glass eye dropper floated in the bottle when the bottle was left alone. When the bottle was squeezed, however, the glass dropper sunk to the bottom. When the pressure was released from the bottle, the dropper floated back to the top of the bottle. The dropper floated at the top of the bottle when no pressure was applied, because the air inside the dropper was less dense than the water. When pressure was applied to the bottle, it squeezed the water which squeezed the air out of the dropper, increasing the dropper’s density. When the density of the dropper increased, it became more dense than the water it was in, causing the dropper to sink. When pressure was released, the air was sucked back into the dropper making it less dense than the water again, so it floats back up to the top of the bottle.
Air is less dense than water, so air will float on top of water. According to the Scientific Principles page, in the chart it shows that air has a density of 0.0013g/cm^3 and water has a density of 1g/cm^3. The lower the density of an object, the greater its ability to float. Since the air has a lesser density than water, it caused the dropper to float on top of the water. Also according to the Scientific Principles page, under the Density section, it states, ”The density of an object depends upon the masses of the individual particles that make it up, and the spacing between them. When pressure is applied to the bottle, it does not increase the mass of the particles that make up the dropper. It does, however, push them closer together. So, it is not, in fact, the mass increasing, but the